I'm no doctor but it's sound a little bit like something I've had in the past. I got the same symptoms and went to my Ob/Gyn and the diagnosis for me was Cervical Dysplasia (pre-cancer cells that show up in forms of blisters). Eventually I had to undergo surgery to remove the ones that were in the inside that one cannot see. It was an outpatient procedure and I was fine to go home the same day. If it turns out to be that and it goes untreated it will turn into cervical cancer. I suggest a visit to your Ob. Good luck!
Hi! Ulcers in this area are usually due to syphilis, herpes, chancroid, granuloma inguinale, and lymphogranuloma inguinale. Hence a STD panel should be donefor this. Other possibilities are disseminated lupus erythemosus, cancers, and Bechet’s disease. There is another possibility—an allergic reaction to something (cream, lotion, razor, soap, tampon, condom, sanitary pad). It can also be due to trauma during sex not healing due to diabetes. It is difficult to comment beyond this on net. Please consult your gynecologist. Take care!
I'd suggest going to to your doctor or a gynaecologist ASAP. Even if it's not an STD it sounds serious, and if it is... well either way, getting treated sooner than later is always a good idea especially if it's not going away on it's own.