Suggest Treatment For A Vaginal Wound

I notice that I have several thin, long cuts on the outside lips of my vagina. They are usually about 1 cm s distance from the area around the clitoris, or down the bottom near the anus. They hurt quite severely, and the pain lasts a long time. They are especially aggravated by urinating, sex, any tight underwear or any temperature of water. When I get any I try to take a lot of baths in tepid water to make sure the area is very clean, then I always dry very carefully. The cuts seem to bleed a little bit, but not very much at all. They appear as long, thin slivers. They look a bit like long paper cuts. I have only been sexually active with one man, my boyfriend, and neither he nor I have ever had any STD s or STI s. The pain is quite bad, and it is very uncomfortable, and I am just wondering what it could possibly be, as they seem to have no obvious external cause.