Suspicious behavior

Hi ladies. I just need some advice please. I need some reassurance that it’s not me being paranoid or if I should be worried.

My husband of 12 years and I just recently had our 4th child. For the past month we have been arguing a lot, we obviously have argued before but would make up right away but lately when we fight we will go a day or two without speaking at all. It hurts to be completely honest.

Last night we had another argument, went to sleep mad at each other and we hadn’t spoken all day or texted until like 30 minutes ago. He called to tell me that he has to stay after work for about 2 extra hours. He’s has had this job for 5 years now and he has never stayed extra time, like ever! He already works 10 hr shifts. I right away got a horrible gut feeling, something I’ve never really felt before. He’s never given me a reason to doubt him till this day but something about this just has me wondering and over thinking. I acted completely cool and like it didn’t bother me but the gears in my head are turning and not in the right direction. Specially with him talking all over the place. He sounded nervous and I don’t know if it was just my imagination.

*he was all over the place but to what I could understand, supposedly his boss needed help at his house installing something, that he wanted it done before he had to go on vacation tomorrow * it doesn’t make sense to me.

Please someone give me their honest opinion. Maybe it’s all in my head because we have been arguing and feel a little insecure but then again this gut feeling is making me go crazy and I have every right to have some doubt. Tia