I dont know what to do 😬

Birth isn't about your boyfriend/husband/fiance. It's about you. Yes, it's scary as a man to watch your significant other going through something new, painful, terrifying. But he is meant to be YOUR support. You're the one undressed on the table, not him. You're the one in physical pain, not him. If he needs support that bad and doesn't think he can handle it without his mom, he could wait outside the door with her in my opinion. Harsh? Probably. But he needs to respect your boundaries and should be working to make you as comfortable as you can be in such an uncomfortable moment and not trying to add to your stress.