Need advice / support in shock

I’m 10 days away from giving birth to my and my boyfriend’s son. It’s is neither of our first babies but it is our first baby together . I been suspecting something is off idk a gut feeling. I went through his phone while he was sleeping and on his phone I found his grinder account. He has been cheating on me since January on that account with not only women but multiple men as well. All up until the morning I caught him. Even the morning that I caught him he was sexting people while I was making breakfast. there were messages from even an hour prior while I was making him breakfast. While I was in bed with him he did it. And since January . consistently since January up until the morning I caught him which was just a couple days ago. He has been paying for atleast one service that I know of from the messages getting a blow job in his car. We just signed a lease together moved in together having a baby in 10 days got a car together just started getting everything for our new place getting ready for the birth and this entire time he’s been cheating on me with not only women but men. He wanted to suck men’s things asked for men’s pics and sent 100s of dick chest and ass pics to different men and women. asking if they host and trying to meet up with multiple of them and met up with atleast one that I saw from the messages. He gave my syphillis a few months ago swore he never would cheat on me or didn’t cheat on me but I think I know now how I got it from him… he’s been cheating this entire time behind my back. I moved out of the apartment that we signed a lease for just a couple months ago and took all my stuff to his mom’s house (my family lives out of state). I’m giving birth so soon and baby has some issues with his kidneys and hearts that will need monitoring including needing possible penicillin and I am just in shock as hurt mad all the emotions above. he will no longer be in my c section with me his mom will be. I think I have to cancel everything for the apartment because it’s all under my name and really just not have a relationship with him. I am at his moms house now and I understand he will be here for many reasons but I just have no good words to say to him . (he said he is staying at the apartment )