Feeling off

Laurie
For the passed two months or so, I've been feeling a bit off. I know I'm not pregnant, but I've been occasionally getting sick and throwing up in the morning. I've been rather moody and had a very low sex drive too. The only thing I can think it is is the birth control I'm on. I've been on it for about six months and it has never affected me like this. I can't go to the doctor because I'm sixteen and my mom won't take me for anything to do with birth control. Any suggestions on what it is or what I can do?