Gosh it *****. I just feel like he is turned off by me now. Even rough he aways he's not.
For all he knows it could be chafing or heat rash. Maybe even razor bumps. He needs to stop making you feel like its your fault! He needs to be more sensitive! It could be nothing.
Just do what you guys are planning to do and get checked, its the safest, most logical thing to do.
Talk to him, you guys don't need to stress out about it until you figure out what it is. Worrying and stressing about it beforehand will do nothing but make you worry and feel bad, and there is no reason for that!