Venting....

Champayne
So I check my fiances phone for the past couple days when he isn't looking or in the shower because I felt like something funny was going on.... So I go in and see he has his best friends number twice and I know the best friend so I have his number too.. I call the second number in my phone and a female picks up 😡so now I know every time I'm he said he's talking to his friend it could have been him or her but then I check the call log and indeed it was her he has been talking to and face timing.... Mind you I'm 3 months pregnant with this jerks child and he wants to sit there and play games when I ask him about it and starts deleting text and acts like he deleted her number but called it so he would still have it.....
Of course he's sleep so I went and deleted it and blocked the number .... Do I have the right to be mad or is that stalking him? And he told his Friend some girl played him and that's the girl he's been talking to soooo I really don't know what I should do... Trust me there is a lot more to the story but it's way to much to type