My new counselor recently told me she feels that I am a highly sensitive person and that because of it I feel things more intensely than others. From what I've read on bipolar though it does seem that many BPs also feel things strongly too so it could be one or both for you. There is plenty of information on Google on HSPs and my counselor also recommended I read a book on it which was really good and helpful. It didn't necessarily describe me to a T but there were a lot of things in there that described me.

I was having a little breakdown the other day but didn't feel that my mood was high or low. My boyfriend of 9 months said it was the bipolar and I said I don't think so. When I did talk to my counselor about it she felt the situation and response was related to my HSP.

I also have been working with a career counselor the past few months. I took the Myers-Briggs test and we are going through the analysis right now. When I was in college I was an ENFJ. E stands for Extrovert and I always did feel that way in the past, but through my journey and discussing the differences and extroversion versus introversion I definitely feel I am an introvert. I don't know where you are at on that spectrum but there's a possibility that some of your emotions/feelings could have to do with that as well.

Of course, I'm just trying to throw a bunch of things out there for you. We are quite complex beings and being BP doesn't help, but there is a lot more to us than the BP diagnosis like Family of Origin stuff, etc.

Hope this was helpful.