Something feels off

Has anyone ever gotten a gut feeling about their significant other cheating? He's not the type to but lately we have been off and he's been snapping at me for little things even if he can be bossy and a know it all its out of the ordinary and excessive. He came home from work today and didn't really make eye contact with me. One time he left because we argued and he took my car and he wasn't answering the phone because it was getting late and we have a one year old and I was just worried. And I used his smart watch which he didn't know that you can see where he was and it was at these apartments. But apparently he was just mad and wanted to park and eat which makes sense but then he sent me this loving text when he was at work the next day about how much he loves me and he hasn't been treating me kind and he wants to treat me like a queen and he hasn't sent me nice texts since before I got pregnant. I don't want to make something out of nothing but something is off and my gut is telling me something and maybe he's just out of love with me. I try to talk to him and not in an accusing way or mention anything but just ask him if he needs anything and how he's feeling,etc.