Why does my vagina still smell?

I had sex with this guy on tinder. It was supposed to be protected sex at first but he took the condom off at one stage. Then put another one on and later said it was getting dry so i let him take it off (silly me) but he didnt cum in me. Its been a month im on my period now, & my pussy smells so bad still. Ive gotten tested and nothing came up.

After having sex with him i notice when i went to pee it stung probly because of bacteria in my uretha but that went away.

Why does my vagina still smell so bad? Does this happen from unprotected sex? (He didnt cum in me tho) How do i treat it?

I remember the other times i had sex my vagina didnt smell this bad