Dad chooses stepmom over me (sorry long)
If you are 18, you have a LEGAL right to the things that belong to you in your father's house, especially if they were given to you as gifts by other people or you paid for them with your own or gift money.
I suggest that you make and "appointment" to go and get your things with a third party.
The third party would be a trusted family friend of both yours and your fathers... perhaps a neighbor, someone from church or school. When you go, get ONLY the things out of your bedroom and nothing else. If items are missing you can take your father and step mother to small claims court.. IF that is the path you choose to take.
I am not taking sides with you or your father and his wife.
ALSO, since you have been kicked out of your father's house---HE needs to be supporting you at your mother's house--via child support. IF your mother was paying it to him, then SHE needs to go back to court to have the custody and financial aspect fo your custody determeind. Yes, you are 18, BUT you are still a student in the eyes of the law and your parents are legally responsible. Check your state laws... get your mother to call an attorney or seek advice via legal aid.
Also if the college money was in an account with YOUR name on it too---you should persue that legally. The college money may have been part of the divorce settlement with your mother. I'd say... its time for a lawyer to get involved... and daddy might have to foot that bill too.
What made me sad is you having to go to a different school the last 4 weeks of high school. It would be very difficult to leave all your friends since 3rd grade. I hope your mom can step up and be a mother to you right now because no 18 yr. old should have to go through this. One thing I believe is time does heal and being away from your stepmom and her negative comments is probably the best thing. Keep us updated on your situation because you can always talk to us when life is hard. Take Care, Louise