Mother In law Wants Me to have Abortion...

So Me and my boyfriend have a very good relationship...and me and his mother had a even better one together, recently i told her i am pregnant and she acted extremely excited and was all over the place happy and smiling...She told her mother about it and things went downhill from there, his mother put me out of the house and texted my phone saying that she needs both my parents phone numbers to tell them that i need an abortion. My bf is Pissed because he came home and he didn't know all of this had even happened. I currently stay with my mom and am trying to get things together for myself, His mother even used the fact that i've had a past Miscarriage (from a completely different relationship years ago) As a Reason that I "Trapped her son"....At this point i'm stressing and i don't know what to do. Me and my boyfriend are both 20 Years old .