Please help relax me.

G
I just caught my boyfriend with a woman in his car.  He didn't know I was behind him.  Once he realized he tried speeding and disappearing.  I pulled next to him at a light and had eye to eye contact with him and the woman in his passenger seat.  He ran the light to try and get away from me.  I followed him.  He finally dropped her off on a corner then drove off fast.   I approached her with a calm voice and asked her if she can please give me any information.  She said they met on tinder and they just came from a bar and she didn't know he had a pregnant girlfriend.  He called me after and said I could've got him arrested bc he was drinking and driving and he also said he just met her bc I can't give him sex bc I'm high risk.    I just need help staying positive for the pregnancy.  I'm 6 1/2 months.