Are you possibly ovulating?
OK, despite your reference to a wet dream, you are a female? Was it clear, stretchy and kind of slippery, like raw eggwhite? It was probably your "eggwhite cervical mucus." You can google that term and come up with a lot of good descriptions. Normal mucus in that area is thin, whitish like milk or maybe a little like milk mixed with snot, but not stretchy and thick by any means. That happens (in a normal 28-day cycle) something like at least half of the days, or even almost all of them. Eggwhite cervical mucus happens only one, two, or at most three days out of the menstrual month. It is an indicator that you are about to ovulate (produce an egg). After you ovulate, in about two weeks, a period comes. The function of the first, thin kind of mucus, is to clean your vagina, and to block the entry of sperm. The function of the second, thick mucus, is to facilitate the entry of sperm right up the mucus into the cervix. It's part of the complete cycle of producing an egg. You'll see it often over your reproductive life -- it's pretty noticeable when it comes!