I'm diagnosed bipolar 2 and am under treatment.

I don't understand what's going on. I think I am acting, doing, and perceiving that I am doing things or reacting to things a certain way, but people say things that make it seem completely different. Things keep happening that are unexpected or don't make sense. I don't think I am doing things, but that is not what I'm told by others, and I don't remember at all doing or not doing something. I really don't get it. Things just are starting to seem totally "off" now and it is starting to really worry me. How do I even know what is really and what isn't, by this point? What if what I think I'm doing is not what I actually am doing? Things really are not making sense any longer.