Smelly smell

Every time I have sex with my boyfriend, I start to smell really bad. Like terrible. He doesn’t cum in me & I was on the patch.

The smell doesn’t go away by itself. I use flagyl/Metronidazole but I don’t want to use it constantly then it might stop working.

To prove its him, I took the flagyl then didn’t have sex for over a week. The smell came back the very next day after intercourse.

I’m not a smelly person on my own or in general. I’m assuming he’s not cheating but what could it be and what can we do to fix it?


He doesn’t smell, we’re both very hygienic. Clear of STD/STIs; we got tested together.