The way I would choose to look at this situation is like this....
Just how much does this relapse really change?
What does this relapse prevent you from doing in your recovery that you want to do?
Are the extreme feelings of anger at yourself a reasonable way to respond to the impact this single instance of using is going to have on your life?
Is it however a normal and common response?
Why is the relapse making you feel like this?
Is the using more likely to have a negative impact on you or is your emotional response more likely to?
Are these emotions going to help you in your recovery or hold you back?
If you are serious about your recovery will the act of having used hold you back?
Is it possible to take a positive from this and change your outlook in a way that will increase your chances of recovery in the long run?
Now...for me, and I'm guessing many other people, the responses would go something like this:
In practical terms, pretty much nothing.
In practical terms, pretty much nothing.
In light of the above two responses, no of course it isn't.
Yes, I would wager most people fighting addiction probably feel like this at some point. I know I have.
Probably because you are in a very emotionally vulnerable place and full of confusing, negative and enraging feelings/beliefs about your experience of addiction and your actions during it. On top of this you have probably been part of some sort of societal system-be it some sort of philosophy of addiction you have been encouraged to adhere to under threat of never getting well if you don't or simply the wider cultural zeitgeist-that is telling you that you will always be this way, reinforcing those beliefs.
For me it's my emotional response to having used (be it positive or negative) that will make me use again. The future is not fixed or necessarily determined by the events of the past, there's a human response in between that is the driving factor.
Negative emotions can help me in my recovery if I examine the causes and implications of them, but simply feeling terrible without examination is a fast track to using again.
I don't see any good reason why it should do, I make the decision as to how I respond to the events of the past. I am not an automaton with a predetermined response and it is up to me whether something has a positive or negative impact in the long run.
Of course.
Just my outlook.