If the intercourse was 5 days or less ago, then yes emergency contraception is available. Ella One is effective up to 5 days after unprotected sex. and plan b is effective 3 days after unprotected sex. If you are on birth control (pills, patch, IUD, etc) and are using it correctly then I wouldn't worry about emergency contraception though. Hormonal contraceptives are more effective than plan b/Ella One and have fewer side effects. If you are already on birth control it protects you highly effectively as long as you use it as directed.
I'm really sorry you're dealing with all of this, this guy sounds like a real asshole. First knowingly exposing you to an STD and then finishing in you without your consent. I'm sure you've already decided this but please don't see him anymore, he clearly only cares about himself at the expense of your sexual health. I'm so sorry you had your trust violated this way.