Sex addiction?

My husband has been acting really off lately about his phone and I had a feeling… so I checked his phone. He’s been trading nudes and sexting women on an app called Add Chat. He literally sent a girl a picture of his dick right before we came upstairs for bed while he was in the bathroom “pooping”.

He says he just has a high sex drive I can’t keep up with, that he doesn’t intend for conversation to go that route but does nothing to stop them once they start.

I’m pregnant and SPD is taking a huge toll on me. It’s painful to sit/stand/walk/anything let alone have sex. Despite this we’re still having sex 4+ times a week, so he’s not exactly deprived of intimacy… On top of the nudes swapping I found a bunch of porn on his web history.

I honestly think he may have a sex addiction. He’s always been hypersexual but I had no clue it was going to come to this…

So here’s my question: I know you can’t just “fix” people, but how do we go forward with seeing a doctor about this? Does he just call his primary doctor and say “hey, I think I’m addicted to sex” or is it a therapist he needs?

If you’ve been through a similar situation I would love to test your story and how you got through it.

If I wasn’t 800+ miles away from every single one of my friends and family members I’d be gone by morning and let him stew in the shit show he created hoping it would solve the issue ..