Shaving question?

So yesterday (and this isn’t one of those ‘Am I pregnant post’s’ cause yah girl was smart and used a condom) but yesterday I had a dick appointment and yah know I shaved everything down there. Well he comes over and I mean he had a little bit of hair but it wasn’t like a forest and it definitely was at the point of looking like a naked mole rat. But anyways he was hitting it missionary for most of the time but now the next day I’m feeling itchy and like the front part kinda burns when I touch it. But Ik I don’t have an STD cause most of y’all might be thinking that rn and that I should get tested. But is it possible for me to get heat rash ? Cause that what it kinda looks like.