First thing you really have to do is find out for sure if you are or aren't preggers. You'll drive yourself crazy with all the what if's until you do know for sure. Then go from there as your starting place.

If you are pregnant then you have to be honest with yourself and what you believe in. If your BF can not be supportive of your choices then there's a problem in the relationship somewhere. Adoption is a wonderful thing if that's what you choose. But in the long run it is your body and your decision. It's a lot to deal with. Much Luck to you.