Okay so I had this once before back in september, but I thought it was a yeast infection and treated it as though it was. It went away and now it seems to have come back? Im not sure what it is, it’s a really weird discharge that’s kind of tube shaped. When i had it in september it was tinted slightly gray/greenish and i’m not sure what it is or why it’s there. I’ve been sexually active for a while and i’m 17, but i always use protection and i don’t have sex often. What could this be? Please help me