Lying ex

Caitlyne • Bonus mom to 2💜💙 Bio mom to 1 💜
So when my ex and I first got together he told me he was a virgin (we're both 16) no big deal. 
There were rumours, however, of him and this girl having had sex. I just couldn't shake the feeling. So I message her on Facebook. Sure enough, he was lying. I confront him and he admitted to it (keep in mind this is a month or so into the relationship) 
He told me she was the only one but that he didn't like the count it because he was high and drunk and barely remembered.
I knew they used a condom AND that she was clean.
We were together for 9 nights... I find out a month after we broke up that he actually had sex with 4 girls before me... 
No idea if they used a condom and I've got no clue if they were clean.
I'm so infuriated! If I had known that I wouldn't had him get checked or used a condom every time.
Now I've gotta go get checked for every std in the book! 
It's not the fact that he had sex with 4 people before me, cause I don't care (my current boyfriend has slept with 15 but gets tested after each one) 
It's the fact that he didn't get checked and lied to me about it.