I'm at my breaking point.....

Idk what to think anymore.... Tonight my hubby said he was going to bring a friend home from work because his car wouldn't start, so I said that I was gonna get dropped off at his work so we could just ride together then go to the hospital to check to make sure it wasn't my water leaking. After I said that he got all mad and said that he couldn't find his friend so just to forget it and then said someone gave him a battery to put on his car so he didn't need a ride anymore. It just seemed odd that he was going to bring his friend home then got mad I was gonna ride with them and then said he couldn't find him and then said someone gave him a battery.... I told him he made it seem very suspicious and he laughed at me for saying it. Last week he stayed 15 mins over and was talking to a friend idk if it was same one or not. Idk my mind is racing thoughts. I'm scared that my instinct is right....😔 I'm 31 weeks pregnant and never thought I'd ever have this thought about my husband....