What Causes Whitish Grey Discharge From The Vagina?

Hello, this is kind of embarassing, but i'm not finding any other websites to answer it, so i thought i'd ask an online doctor. On & off i've been having this pain in the left of side of my vagina lip, it doesn't hurt that bad at all, sometimes it causes a burning when i pee, but not every now & than when i play with. I am having discharge but nothing abnormal to what i've always had. I've always had a whitish, greyish, discharge, & sometimes alot of it, but i've always had it & been tested while having it & been clean. I'm also having an odor right now that kind of strong but not to much. Please help! Thank you.