I need advice

Bethany • Bethany Leona lemley
My boyfriend I did had in this picture.  He went completely phycotic on me.  With words. And. He will not stop.  Harassing me and accuseing me of cheating when I never once. Cheated I felt trap I felt scared. And I try to help him. But he bout caused me a heart attack knowing there was a chance of pregnancy.he is clearly unstable. What should I do if I find out I am pregnant should I keep it from him. And not put him on the birth certificate  help with advice please