Hi there ~
I understand your concern. It may be that you are having a urinary tract infection
. I feel like you might need to get a urinalysis
done so as to find out if you have any problems with your urinary tract. It is very common to have a urinary tract infection during times when you are not hydrating yourself enough. Also keeping your sexual hygiene is important and you may have had a heat rash
if you did not keep good hygiene in your genital area. I hope you visit with a doctor especially a dermatologist
who will be able to help after examining the area.
I hope this helps. Take care and have a lovely day!