Trust Issues!!!

Okay I know this might be a long one but you girls on this app are honestly all I've got and all opinions and advive is very much appreciated... So, me and my boyfriend have been together over a year and we've hit a couple speed bumps along the way, of course every relationship does, but.. I has some issues a while back where he was hiding his phone from me and later I found out it was just porn and I get that he's 22 and I didn't find out until recently that I'm only the third girl he's ever had sex with and the first girl he's had sex with more than once! We live together and have for a year so of course we have sex regularly. Well, it wasnt until I found porn the THIRD time that I he told me he has had a problem with porn since he was younger and I told him when I found it that it wasn't a big deal just don't hide it from me because it makes me feel real insecure and then being a woman I think the worst always! (lol).. But seriously so he had stopped for a while or so I thought it wasn't until the third time that I found him hiding it again that it pissed me off! I told him that if he's curious about stuff or wants to try anything new that I'm all for it! Don't feel ashamed or embarrassed. Well that didnt work either. So I found it one more time I got really mad and couldn't help but ask "what the hell is wrong with you?! Do you need help? What?" well he takes his phone and smashes it with a hammer? Idk ive never seen him act that way... (also keep in mind when i met him he was very very much a man of God, i dont know what when it changed but it took a complete 360) so things were fine he got a new phone about 3 weeks later. Well I thought things were great between us sex was great and regular almost daily. But one day the second to last week of October we just got done having sex we went outside to smoke and I picked up his phone to get a recipe(right on front of him i swear i had no thoughts of finding anything but then again i wasnr looking) i found him on a dating website looking for a discrete affair!!!? My heart broke and he said he didn't know why he did that and that he wasnt actually going to go through with it. But i found pictures on his phone that he took from my phone like of him that i took while we were vacationing and everything he was going to use them for that site! Well I had made plans on leaving until I found out I was pregnant a week later. Well I had put a lot of thought into it and told him I wanted to leave and he just cried and cried and said please don't do this so I've been trying to make it work. And things I thought were fine. And last night I asked to use his phone and he threw a fit but I finally got it and when I did I found more pictures and videos that he didn't even delete he just emailed them to himself hid them in his trash folder like I wasnt going to find them. Ugh!!! I don't know what to do or say but I'm trying to make this work. I mean, can't he just hold me and tell me he's sorry and that he'll try to be better???!!! I mean damn!!! We have a baby on the way