I've felt this way and have done these things as well. I've racked up quite the tuition debt because I've enrolled in classes and dropped them, changed majors, enrolled in those classes only to drop those classes in the middle of the semester. I'm quite impulsive in my bad moments. The only way I'm not impulsive is if all I do is go to work and come home and watch TV/read which, I confess, I do a lot lately because I like being stable and drama-free, though I am quite lonely. I notice that my symptoms are also exacerbated by my hormones and was taking the Pill to kind of alleviate that but my current insurance does not cover it (I work for a Catholic hospital and they don't cover contraception of any kind...nice) so I guess we'll see how that goes.