ok, i wasn't going to bother replying here since its gone, but... whatever it was disappeared in 3 days from it occurring.
I believe it was some sort of infection of the throat, possibly a cut. Either way it healed.
If someone similar gets it just get some mouth wash and gargle it, brush teeth better and i also gargled salt... seemed to get rid of it pretty quick.
I cant be sure but I believe it was an infection as when I opened my mouth it looked like it leaked out as a white pus sorta liquid, in the morning 2 days after it started... that evening it was completely gone.