Is thinking your husband is cheating on you a pregnancy thing?

I have never ever had trust issues with my husband. I’ve literally always felt like he loved me an immense amount and really nothing has changed in the way he treats me.

I’m 6 months pregnant and I would say I’ve cried a good amount over a few silly things this pregnancy and want to blame it on the hormones.

My husband finished his masters degree in December and started a new job at an accounting firm. Some nights he works pretty late and tonight he’s been at a college friend’s house studying for his first CPA exam. Don’t get me wrong, I am incredibly proud of him, want him to succeed at his job, and of course pass his exams. But there is this tiny voice at the back of my head as we near 8pm of him studying, suggesting he might be cheating on me.

So some details:

He has never cheated on me

I have been cheated on in previous relationships

We have a two year old daughter I stay home with

and he adores being a dad

He compliments me and hits on me every day so I don’t have a reason to think he’s not attracted to me

I am not used to him working so many hours a week yet, although I know it’s expected

We always talk about his job/what he’s been up to

I have felt unattractive as a pregnancy thing

I have been super uncomfortable and hardly up for sex

I know he wishes we had more sex and this alone makes me feel guilty and insecure

I did not feel insecure like this my last pregnancy

Maybe relevant: A whiiile ago I saw this twitch message on his phone from some random girl saying she wanted to make friends and have a good time or something pseudo sexual- like sometimes you get on fb from creepy guys. He responded back, in pretty dull one word sentences, but he still responded back. I asked him about the app in general and he laughed and said it was a dumb app that he got when we wanted to look someone up together (true) and then deleted it and I never thought about it again. Until now obviously.

I feel like a psycho but part of me wants to go through his phone. But I’ve never been that kind of person and we are generally so open with each other that I feel like I’ll be exposed as a crazy person. And then the crazy part of me is trying to figure out how to secretly get his phone.

Has anyone ever had weird feelings of insecurity simply because of pregnancy? I kind of told him I was feeling insecure, without any details, and he reassured me he loved me, he couldn’t wait to come home, etc etc etc. I want to be honest about exactly how I’m feeling but half of me thinks that he’ll rightfully think I’m crazy and the other half thinks that if he has been up to anything, he’ll delete all evidence because I’m onto him.

Geez I can’t even believe I am typing this. I know people on here say to trust your gut. This is so not me and so not us I just don’t know what to do