I feel you, I'm also 18 & I wrote a post on Monday on how my mom treats me like im trash & keeps insulting me for getting pregnant. I called her on her bday & she told me to never look for her again, I know shes mad but shes pushing me away.
I think thats the typical reaction moms have to hearing that their daughter is pregnant at a young age. My mom reacted the same way when I told her I was pregnant when I was 16. She eventually got over it and became super excited about having a grand child that she would get to see every day for a couple years. Give your mom some time to let it set in.
My mom also said she would not have me living at home with a new baby, so I needed to move out. I understood this completely. I am 23 though lol. It was time to move out, me and the boyfriend were just trying to save up money before making that step. We live in our own 2 bedroom apartment now.
She will come around. You cant expect her to support you financially, but emotionally for sure. I believe she will support you once the shock wares off.
Just give her some time!
Mom told me the same thing and I totally understood :)