Sometimes I think the fear of the unknown is the greatest fear of all. But really, the unknown is everywhere and everyday. We have no control over some things.
I think that many people can relate to you feeling scared and overwhelmed right now.
I can only hope that whatever decision you make will be the right one for YOU.
Just as a sidenote* I'm not trying to be negative and I'm not sure about the laws in your state, but I'm under the impression that it's basically the same in all of them so you may want to check. But if you decide to put your child up for adoption, I believe you need the father's agreement as well to that decision. If you want adoption and he doesn't, it may be possible for him to get custody of the child. Unless you prove him unfit, etc. which could become another whole headache in itself. My point is that you may want to check into the law. In the end, it may help you make a decision.
Wishing you lots of peace.