Is partner cheating?

Longggg post...

Back story, we have been together 5 1/2 years, 3 yo daughter together, and currently 18 weeks pregnant. We moved out of state 2 1/2 years ago for his business (grows cannabis) in a legal state.

Idk if it’s because I’m pregnant or my gut feeling, but i feel deep down he is cheating on me. I have no “real “ proof. He deletes a lot off of his phone because of his line of business. Has since he started (3 1/2 years). He also uses private safari web browsing. I’ve confronted him about my feeling, but of course he denies it and calls me crazy and causes a fight. This morning, i go through his phone and i see he took two selfies yesterday afternoon in his truck. One thing i know about him, HE DOES NOT TAKE SELFIES. So i ask him, why did he take selfies and who did he send it too. He just said “he just felt like taking selfies”. Which i call BULL on. I’ve been cheated on before by an ex. I found out because of my gut feeling. My current partner had cheated on me 4 years ago (one night fling thing). And earlier this year we had gotten into a big fight, i was about to leave, but never did. A few weeks after that fight i go through his phone, and i see he made an account on colombiancupid.com. Fast forward to now, i feel

Like he has made an online dating account. He does leave his phone unlocked, and i do have his password. But with online dating, you can go on private safari and talk through there. For the life of me, i don’t believe him. We barely have sex and if we do i initiate it. He works 10-12 hour days 6-7 days a week. He said he’s tired, doesn’t deny me but doesnt initiate it either. I know he is working because he comes back home looking like he’s been hard at work. I’m tempted to put an app on his phone to track it. Like i said idk of it’s my insecurities because I’m pregnant or my gut feeling. I’ve never enjoyed being pregnant. I’m Used to be fit and put together.

Please help! I just want to cry with all these hormones.