Awe I feel that way to sometimes, like I can't get enough air into my lungs, usually when my anxiety is not under control I have to keep telling myself to remember to breathe. I think therapy is a good idea, I agree psychiatrist is not the same, sadly not a lot of people realize that. I don't think just taking medication is going to solve anybody's mental problems. I believe taking a holistic approach to healing to be the best route, taking into account aspects of the circumstances, psychological as well as biological aspects that are effecting you. She wouldn't put you away for day dreams, I would tell her, it could be something going on with your medication that needs to be adjusted. I tell mine about homicidal as well as suicidal fantasies and they can't do anything about it except talk to you about it, unless they become actual plans and intentions.
I day dream about doing the most brutal things to random people in the streets who look at me funny. Sometimes I think about doing it to people I know to, or myself as well, but usually its about people I don't know or people who make me angry (including myself). I know what you mean about being less than honest with the mental health system, I struggle telling the whole truth to them as well out of fear I'll be labelled dangerous or psychotic. I have a lot of trust issues, and growing up I was frequently punished for being honest about my feelings. My feelings were "inappropriate, unacceptable and wrong" so I struggled disclosing my actual feelings with MH professionals for the longest time. It takes me time to be able to open up about this kind of thing.