Burning Sensation after an Orgasm?

Why is it that everytime I masterbate and have an orgasm I get a burning sensation in my vagina?  I guess it burns after cumming? But even then, I don't cum that much. I don't even know if what happens to me counts as cumming? Like the most that happens is I can feel wetness down there and then later on I'll see a clear discharge in my panties. Kind of like mucus? But less thick? It's not white or milky or anything, it's just clear. It's never a lot either. And I don't masterbate by fingering so it's not like my fingers are irritating something down there. I only rub my clit. This always happens, so why the burning?