For me, the PAWS lasted a good 3 months after the initial 2 weeks of physical withdrawal (I tapered off using Suboxone, then ran out of those and had to detox off of them. Not fun at all.)
The biggest PAWS symptom for me was anxiety. I'm an anxious person on a normal day, when I'm in withdrawal or experiencing PAWS it's 10 times worse. I had to give a speech in class one day a few months ago and practically broke down in front of my class, I was so nervous. It was fucking humiliating. That definitely made me want to use, lol.
But it's been better in the last 2-3 months. Other extenuating circumstances have helped, I've got a new girlfriend I'm in love with and am in school full-time for photography, something I'm passionate about. I've established a couple close friendships, which definitely helps.
After my first time getting clean, I spent those 9 months before my relapse doing the AA thing, not going to school, and having next to no friends while dating a girl that didn't trust me at all. It was a recipe for disaster, which is pretty much what happened.
I dunno man, opiates (esp. IV heroin) are my DOC for sure, but I really haven't been craving them at all. I'm not naive enough to say that it'll be that way forever, because I know it'll haunt me for as long as I live, but it's nice to be able to tell myself that I've got too many important things going for me in life right now to risk throwing them all away again. Had to learn that the hard way though more than once, which is the shitty part. Definitely had my fair share of the seventh circle of hell, which I think is something we all have to go through before it finally starts to sink in that maybe risking it all for dope isn't worth it.
At least that's how it's been for me so far