About a week ago I noticed that at the end of my vagina more near the anus part I guess I between it was red and irritated and a little itchy . I did some research and read that it was probably a rash ? Like underwear rash. But I'm starting to think it's not that anymore . Like I feel like if it was a rash it would've gone away by now . Like when I pee it sort of burns because my urine will touch the back part between my anus and vagina. I've used gold bond powder and it's not really working I've read that it could be a possible yeast infection but I haven't had any of it's symptoms besides this . I urinate normally it just hurts when my urine touches the irritated part . My boyfriend and I have been together for 4 years and I know it's not anything like herpes or any STD . Please if someone out there can help I would really appreciate it.. Even if it's an idea on what it might be or what I should do . Thank you so much .