Cheating

Do you girls think that a guy that's super protective over his phone is cheating? B4 I went thru my boyfriend's phone & he was texting another woman (one he used to fuck on consistently before) & seemingly appeared to be setting up a dick appointment... this was when I was About 5 mths pregnant... I then wound up leaving for about a week or so & made it clear to him the only way I'd come back was if I had all of his password to his electronics and a number of other things that I needed him to change behavior wise HE AGREED TO ALL OF MY REQUIREMENTS on top of begging me to come home... just to only a week later tell me he doesn't want me going thru his phone because I don't pay the bill ... & when I did go thru it again he spazzed & got really angry...so I'm not really sure what I should do ... I'm 36W Pregnant and I just want us to work ... but still I have this thought in the back of my brain every other day that I'm not the only one ... advice pls?