WARNING TMI!!!

Hi, so yesterday night I had abit of brown discharge when I wiped I assumed it was the start of my period so I put a tampon in, I woke up in the morning to no blood or discharge on the tampon at all! I've changed my tampon twice today it's 6pm here and still no blood or discharge however I've had LOADS of clear discharge that's soaked through to my underwear and trousers but it stinks of really strong fish!! (Sorry) what can this be?

I'm 14DPO, I was expecting AF yesterday

Thanks everyone, I'm getting no pain or discomfort from it at all...wouldn't it itch if it was an infection?