Just yesterday morning in the shower i noticed a tiny patch of red on the top of my thigh close to my vagina, at first i thought it was just razor burn, so i wasnt worried. But each hour it seemed to be spreading, getting more red, and swelling. It still is not exactly on my vagina but has spread all around my bikini line. Big red swelled up patches that itch like crazy. I dont itch them. I havent washed my panties with anything new. And i haven't put my panties anywhere I usually dont. What i have done is gone swimming in bear lake, utah. The day before they appeared . i don't want to go get a huge medical bill if its just a simple rash. To me it looks like hives. So my question is how do i treat it? I havent been able to find anything. Thank you. Emerald.