It could be thrush (especially if your discharge was thick and white and kinda ummm chunky)which is an overgrowth of candida. If you see a doctor they'll take a swab and diagnose it otherwise you can just go to the chemist and buy something over the counter. It's relatively easily treated but you do need to treat it cause it doesn't generally just go away on it's own. I don't know how old you are but you'll probably find that using tampons or having sex is kinda painful as long as you have it. Hope this helps
