Random bleeding (this is the 2nd time)

On the 15th of july i thought i got my period. It was medium bleeding but it was only for one day. It was weird. Then, the same thing happened yesterday. And now i dont have my period. I dont know whats going on??? Im gonna google but im also gonna ask you guys. Im sexually active, 17 years old. Sometimes i dont use condoms tbh. My period is usually irregular. Also, the day before the bleeding, my vagina smells weird. Like a chlorine yet sort of fishy smell. And then the next day, i get the bleeding. I keep thinking its my period but the next day its not there and i just wanna know whats going on. Please help😭 thank you

Ps. Ive never spotted before so im positive it aint spotting