3 days ago i started having pelvic cramps and they have been on and off. this morning after peeing i started having pelvic cramps and a burning sensation in my vagina. it stayed like that for a few hours then started again after peeing. what is this?

Vaginal pain, cramps and burning could indicate a sexually transmitted infection. See a Dr in person to get swabbed and tested. These infections do not go away on their own and may cause serious problems such as Pelvic Inflammatory Disease if left untreated. If positive, treatment can resolve the issue in days.

You need to be examined and urine tested before any diagnosis can be made. In the meantime take Ibuprofen and try warm soaks . Hope you feel better