attitude problems

I've been told by family, schools, college and 'friends' that I have a terrible attitude problem.
(second year of college: I'm 17)

If I don't like doing something I will not do it, I'll shout and say horrible things just to make sure people know I don't like it.

It all started at secondary school; I would go to class and take note and all that but then once it came down to the real work on a subject that I don't find interesting, I would not do it. I would tell teachers and other staff that I hate the work and I would just lash out for no reason. I'm normally calm and quite because of SPD.


It's the same for family,I will just shout and swear for no reason, If they do something that slightly annoys me or inconveniences me. This has left me to me isolated because of both problems. I've tried most things but it seems that I just get really angry at things I don't enjoy no matter what it is.

I don't really know what to do, I don't wanna go and see a specialist because that would make me more angry and pi**ed off.

Anyone in the same boat as me?