BV?!?!?

So recently I've had some strange symptoms. A couple days ago I had some weird pain in my lower abdominal area and my discharge was weird. Almost yellow? I thought it was just urine mixed in but now I'm unsure. Today, it smells very bad, almost fish like and the discharge is very watery. No, I do not think it is an std since I had "sex" two weekends ago and it' was with my boyfriend of a year now. And by "sex" I mean it was for literally 10 seconds bc I didn't feel safe without protection. My stress levels have increased dramatically over the last week due to pregnancy scare from the "sex". ( I just get all worked up even though everyone tells me I'm fine) my period isn't due for another 8 days. Soooo, has anyone else had this??? Or had similar symptoms. I recently just found out what BV is. So I'm quite new to it. Please help!!