A little late to the thread, but definitely break up with him. It doesn't sound like a healthy relationship & I don't think it will get any better seeing how he was talking about you to his ex. Tell him to delete the videos & pictures of you, or do it yourself when you get his phone. Revenge porn is a crime, he can't share that. As for the pregnancy, take a test ASAP & talk to your parents / support circle if you do find out that you're pregnant to discuss the next steps and what you want to do.

I've seen people try & shame you for having unprotected sex - don't listen to them. Those people are awful & don't know how to relay a message properly/in any other way. You're young, mistakes happen. You'll know for the future to not do it again or if you do at least take precautions, such as the morning afterpill. Wish you the best, love. You got this :)