help help HELP

I’m so worried. My vagina has been smelling so bad for no reason and i’ve had insane amounts of discharge. I woke up this morning and my tampon was soaked with what i thought was pee but i don’t think so. It just smelled very foul and was yellowish. I personally believe i have great hygiene. I always shower everyday or even more than once a day if i stink or feel nasty, so there’s no reason in that nature as to why it would stink. Also my blood is a weird bright orange, red color and it smells really foul. I have also felt really weak and nauseous. I’m afraid i contracted an std from my boyfriend. He cheated but i gave him one last chance. And he claimed he used a condom but i don’t know, he could be lying which i don’t doubt. (i know i sound absolutely crazy, believe me. i definitely know) I’m currently trying to make an appointment at the obgyn but it kind of feels like an emergency so idk.