Literally not dealing with this right now...

There's a lot of backstory I'm not going to get into at the moment, but I just had a baby two days ago, and I get a message today from the dads ex, who he has two children with (10 & 13),  telling me he's been sending her lewd messages, pics and videos throughout my pregnancy. I'm not even sure what else they say because I haven't opened them yet. Like I said, I just gave birth two days ago, to his kid, I'm hormonal as all get out, tired because baby woke up at three and I couldn't sleep because I just wanted to come home, get home and now I have to deal with this at some point. I'm already angry without even reading them, she says she told him she sent them to me (in another message, I've just been reading the part that comes up on the alerts), and he hasn't said anything. I don't even know what to do right now, except try to enjoy my baby and figure out when I'm going to jump into this mess. 😥😴😠