Some of what you described was reminiscent of withdrawal for me, but from the so-called good drugs. I'm referring to the anti-depressant I was on. Personally I think the prescribed s**T is probably worse for you than the illicit stuff, or at least just as bad, but that's another day's story.
Based on my experience with the horrible withdrawal from the legal stuff, I can only imagine what you guys go through coming off the hard stuff.

I went through all kinds of horrible symptoms and it also made me angrier & raging as hell. It's as if all that stifled anger the drugs suppressed came out when I got off them. It was horrible and unfortunately a lot of this got directed at my boyfriend. Fortunately it subsided somewhat after a few weeks but the withdrawal upped my anger to a whole new level. Not like I didn't have enough of it to begin with.

I'm not a big fan of therapy anymore, at least not for myself or individual therapy, but couples therapy helped us a lot. It helped us learn how to handle me better, taught my boyfriend that some of the things he was saying or do when I was already upset were probably not the most useful with a psycho girlfriend, and allowed him to better understand why I do a lot of what I do even if I don't want to or mean to. It helped him learn that a lot of the stuff I'm doing is not on purpose but based on my past and not having anyone do anything nice for me before. Our couples therapist is an LCSW and he's been a lot more help than some of the psychologists I've been to for individual stuff. If you want to save your relationship and really love your girlfriend, I'd recommend it (just make sure this therapist is a good fit for both of you and that you both feel comfortable with him/her). Also wanted to say kudos for you for trying to get clean again, I know that can't be easy.