Every Time I Masterbate, After I Cum I Get This

Every time I masterbate, after I cum I get this clear liquid coming out of my penis. It keeps coming out little by little for about an hour. I know it is a symptom of clumidia or gonorhia(I apologize for my spellings). I've never had sex or anything close to it. I had a girlfriend for 5 months and broke it off six months ago and all we did was kiss. If it isn't an std what can I do to fix this? And how did I get this.