Weird discharge.. HELP PLEASE.!

Ok, so i woke up this morning with my panties covered in like these brown spots. Idk maybe like dried up blood. Once i went to the restroom, i cleaned myself and i had yellow to brown discharge. ( no clumps, just liquidity) Ive never had this happen to me before. Once i was done, my vagina felt swollen, and like itchy or kinda like a burning sensation but not actually burning & then all day little by little ive been bleeding really lightly. I just don't understand whats going on. I did have intercourse with my bf yesterday with a condom. & peed before & after sex. Felt nothing yesterday... So can i just get some answers. It is an infection?? Yeast infection???? HELP !