smell?

For some reason every time i sleep with my boyfriend and come home (i usually stay at his for a few days as we’re long distance) my underwear or discharge smells of him... i’m not sure if anyone else gets this but it’s weird.

Also i know some people say it can be an STD but i was tested not too long ago and i trust my boyfriend.

But is there anything to help ‘clean out’ the vagina since i want the normal scent back lol