Well, first off, its good to see you have your head on straight and told the people who need to know right off the bat.
That is rather unfair of your mother, but do you have any place else where you can stay for atleast 9 months?
Adoption is a wonderful thing if you can't keep the child but want to carry it to term.But its also not easy, it can be an emotional rollercoaster, but you will get through it.
I don't know what kind of advice you are looking for...But if you have questions feel free to ask
i;m 18 preg with my first, 14 weeks almost =)
how old r u ? How far?
Good luck, theres plenty of support here for you