Ladies advice please!!!

I had just a little trust issues with my husband. He would say he is at work and instead I caught him at his parents while they were out of town and he was jerking off to porn. So we decided to put location GPS on our phones. So there would be no more lies. Plus I go through his phone cuz I always see porn on his phone. So I go through his phone cuz I don't trust him and I always catch him. Well I'm pregnant and maybe a bit insecure. He works a lot and it requires he goes to banquets at hotels and restaurants for meetings and Starbucks for meetings etc. Well I get insecure cuz we just got back together a little less than a year ago. I'm thinking he's meeting up with one of the girls he was dating while we were separated. So today I got a little insecure he went to some hotel and I asked him if he could take a picture of the banquet/event he was at. Fine the day goes on and he goes to a restaurNt then Starbucks. So I ask him who is he meeting up with at Statbucks?? Well after work he says he is not going home anymore and he is leaving his family. I'm pregnant and we have a kid already together. He said he feels like he is living in a prison. So he didn't come home for three hours after work and I was feeling out that he was going to leave us. Now he said he will only come home and not leave us if I never touch his phone anymore and he puts a password on it and he turns off the gps. So who is wrong here and help me out. Was I at fault or him????