I need guidance

Simpson
Okay so ladies please be nice. I'm in a brittle boat . I'll tell you what's happened and I need advice. I was with a guy and we was dating and only for 2 months. It was the same old he said he loved me and had me trusting him. Well a week later he cheated on me and I found he was married to a older woman I found out we lived together and I moved out we broke up well I found out I was pregnant and he's there for the appointments and stuff but he's really mean to me. How do I get over a heartbreaking situation and stay clam while pregnant. This man is playing with my heart and it feels like its really effecting badly. I'm so stressed I'm scared I'll miscarriage because of my stress . How do I move on and learn how to be a mommy. What do I do? How can I be happy again? I'm scared of losing my baby . If anyone can give me some advice I'll be glad to listen.