He is not happy about my pregnancy.

Dear sis, Dolly. I’m a lady of 23 years and my boyfriend is 25 years. He impregnanted her ex girlfriend before they broke up, four months ago. And now I am pregnant too with one month. He don’t seem to be happy that I’m expecting and that kills me. Now I told my ex boyfriend that I’m pregnant and he thinks the baby is his. I don’t know what to do. My ex boyfriend is so support. What should I do? Anonymous Qwaqwa