What Causes Weird Discharge From Vagina?

hello i have this strange buildup in my vagina, am worried cause i dont know where it comes from everytime i go to the bathroom i can see this little almost look like dirk on the tissue and am not sure if it coming from the back or front but i know if i wait a couple of hours that i will have this buildup between my lips of my vagina could it be protein in my unrine please help