I’m just emotionless at this point

I just found out that I am pregnant, and I thought nothing could steal my joy, but then this bitch pops up again. I really now think they have been communicating the whole time. My boyfriend was logged into Facebook on my phone ( he broke his phone and doesn’t have one atm) he never logged out. While I was at work a message came from his ex wife and she said “Jacob ?”. I didn’t open the message and left it for him to get. I dnt know this women at all. At home later I asked him “why is your wife messaging you”. His response was that she was just checking up on him. He didn’t even catch the fact that I said wife and not ex wife. I asked him why was she doing that and he answered back that he didn’t know. My blood was boiling so I didn’t even say shit. I know he knows that upset me but he hasn’t said anything about it since I just stayed quiet. I dnt even know what to say to him but I know one thing is that I’m over this shit. My gut tells me there is web of lies I’ve been oblivious too and I just don’t want any parts. Comments welcome please.