TMI: Rash

So im in my fertile week and me and my husband baby danced last night and then I elevated went to the bathroom and then we went to bex well this morning when I woke up my underwear were wet (with what I assume is excess sperm) and a rash down there do you think it was the extra moisture or what?? It feels raw and it kinda hurts?? He did preform oral but I am sure I cleaned off pretty good. Honestly I'm freaking out a bit.