Rash were panties sit

So I've never had this problem prior to being pregnant so I'm curious if anyone else has this problem. This is the second time with this pregnancy that I have a bumpy irritated slightly painful rash were my undies hit between my thigh and lady part. It's so uncomfortable. I'm def more sweaty down there there normal so I suppose moisture could be a factor. It's just so embarrassing. Chafing possibly? I'm not overweight by any means.