Hugs, NP, I'm really sorry you're dealing with all of that with P. I'd be really hurt by that, too.
Trigger warning, SUI/SH
It could be that P trusts you to reach out to him if you're feeling bad enough (though he should know you well enough to realize you might not be completely open about it--especially with a somewhat loaded question like "Can you be safe this weekend?" (as it probably felt like you had to say "yes"). However, you did that, and then he hasn't responded. He really should have followed up with you in session, and he definitely should reply to your email (does he usually reply on weekends?)
I think this is about him, not about you. Like there's stuff going on with him, maybe with his potential career change. That doesn't excuse it though. You deserve his care and support. In fact, he knows that this is a difficult time for you because of the anniversary, so it seems he should be giving you additional support.
I really hope you hear back from him soon. And, even more, I hope you feel better. Please keep posting here if it helps. We care about and support you.