Hi, I Wanted To Ask A Urgent Question. I Had

Hi, I wanted to ask a urgent question. I had unprotected sex with a guy and soon enough my vagina was itching and burning and had a terrible odor. I'm a teenager so I was afraid to tell my parents. One or two weeks after it was gone. Now, after I had sex with my current boyfriend, nothing terrible or anything bad happen down there.
So I wanted to ask if it was only a yeast infection at the time?