Not necessarily. Cptsd is PTSD with additional symptoms in interpersonal relationship skills and affect regulation. Namely:
- feelings of shame or guilt
- difficulty controlling your emotions
- periods of losing attention and concentration (dissociation)
- physical symptoms, such as headaches, dizziness, chest pains and stomach aches
- cutting yourself off from friends and family
- relationship difficulties
- destructive or risky behaviour, such as self-harm, alcohol misuse or drug abuse
- suicidal thoughts
Complex PTSD is often caused by unique types of trauma. Someone can experience multiple traumas and never end up with complex PTSD. Rather it is the 'unescapable' nature of the trauma which defines resultant complex PTSD. Think long term child sexual abuse or physical abuse by a parent or caregiver, being a child soldier, being in a concentration camp, being a POW and experiencing torture.
It's not simply stacked trauma, it's the actual nature of the traumatic events that cause this particular kind of issue for people. For me it was decades of emotional, physical, financial, and sexual abuse from a parent as well as then falling into forced sex work which recreated my initial traumas almost exactly, and a series of issues with people grooming me in a way that was similar to my parent.
I've experienced being in a war zone, being raped as an adult multiple times, car accidents. None of those things have resulted in any trauma symptoms because they don't register to me as being traumatic on the scale of what I experienced. That isn't to say they're not traumatic for another person, rather that for me personally, I moved on incredibly quickly and suffered no ongoing issues from any of those experiences.
BPD is a very stigmatised diagnosis and we know that trauma plays a role in it, so the misdiagnosis rate is high. Even I was misdiagnosed with it at one stage before I disclosed more of my history to the psychiatrist who immediately rectified it to complex PTSD when she understood the nature of the trauma I've experienced.
I would say that the defining difference between BPD and CPTSD though is the issue at the centre of both diagnoses. A person with BPD does tend to fear abandonment and their behaviour is driven around trying to prevent this from occuring. A person with CPTSD fears trusting people and allowing people to get close to them so their behaviour is driven by that. It can look very similar, as both people tend to be very push-pull with their relationships (and I know I definitely am) but I'll give you an example.
A couple of months ago I fell out with someone who was incredibly important to me. Probably as close to that 'favourite person' thing as I can define, in my life at least. When it became readily apparent that he was basically done being my friend due to his own actions (and I very much mean that, it was a clusterfuck) I straight away went into 'cut off' mode and fucking went off at him to burn the bridge, because I had not felt as betrayed by anyone in my life since my original traumas. There was no begging him to be my friend again, no saying I was going to hurt myself if he didn't come back. I didn't even tell him I relapsed because as far as I was concerned, he didn't have a right to know anymore. I wasn't upset because he stopped being my friend - it was how he did it that was the issue. It was just massively fucked up and manipulative and disrespectful at the bare minimum, and malicious at worst, all because I had asked him to do something he'd offered to do.
If I had BPD I probably would have kept contacting him waaaaaay after we stopped being friends. I sent a couple of messages to highlight how he'd actually been a pretty shitty friend for a decent period of time leading up to that and called him out on something he'd done months ago that fucked me over, but aside from that I didn't contact him at all, nor do I want to. The CPTSD means that once someone shows me they can't be trusted, they're out. There is no back and forth 'oh I miss them maybe we will be friends again' it's done. I simply cannot allow this person back into my life. I was not thrilled with them for the entire year leading up to that event and it was just the icing on the cake which proved my suspicions true so I had to cut him lose.
So while behaviour may look similar, the reasoning behind it is critical.
To also take a look at my self harm and drug use - it isn't impulsive, it's deliberate and serves as a maladaptive coping mechanism. It's not done to get responses out of people - I actually hide it from everyone for the most part. I'll admit when I've done it and not lie about it, but I've never self harmed or used drugs to have someone respond to me in a particular way. That's just been the outcome of the situation when I admit what I've done, but the driving force behind these actions is self punishment due to self blame and because I want to avoid triggers.
If you think you'd be better off with W cptsd diagnosis I encourage you to think about it. There's no issue with keeping the one you have, it's equally as valid (except for its overdiagnosis in women as a modern hysteria diagnosis) but it's something to think about in terms of treatment you'll receive.