OK so I've had sex with my boyfriend of 7 years a lot. And not that long ago he cheated on me with his ex girlfriend. There's rumors saying she has something. So we started not having sex as often. The last few times we've had sex, afterwords I've been getting little bumps, and it itchs like crazy!
I've had uti's, and yeast infections, but this is nothing like it. I'm scared to talk to him about it cause he's very inscure and will over react.
What should I do?

I think that you should go and get yourself checked for any STDs and if you do have one, that is a time to confront him.
I also think it may be a good idea to reconsider whether you want to stay with him or not. He cheated on you with an ex, will over react if you ask about it, and now you are having some health irritations. It is possible that he got something from her and gave it to you, and that is unacceptable to do to someone you love

Kyu745 is too nice.
Insecure? Might overreact? You shouldn't be having sex with someone you can't confront - about ANYTHING.

Well, I made the doctors appt. and he's always saying how much he needs me and what not. I can't leave we have 2 children together, and I can't turn my back on my family. That's why I'm so confused about what I should do.

Oh dear. Children do make it complicated. I was a computation for my mother, she waited 8 years before divorcing my father, secretly saving up enough money. You may want to give your children a life with both parents, but how happy will they be if mom and dad are fighting and he goes off some nights fr no reason and then you two fight?

You could end up very sick if he gets something and gives it to you. STDs can lead to death, and how horrible would it be for you to die from a disease your cheating partner gave you then leave your kids in his care?

I think you should leave, take the kids and drag him to court for a good chunk of child support because he does not deserve you and you and your children deserve better than that. Even if it takes a few years, start saving up, but do not let yourself live unhappily, it will scar you forever