stressed!!!

The guy I've been seeing on and off for about 6 months now, we just found out I'm pregnant & I have my first doctors appointment Tuesday! He wants me to consider to abort.. but says no matter what I decide he is by my side. I don't want to abort I wouldn't be able to live with myself but he has been stressing out so bad about all of this and says we are not ready. I am still living at home with my mom & she has no idea. I don't know how to tell her because she hatesss this guy since we have been so on and off. She doesn't want me to get hurt and I understand but now I'm scared of how she will react & he doesn't want to talk about the baby any. Im scared and don't know what to do & just wanna know if I keep the baby (which I plan on doing) when does this all get better?