Help?

I think I might have like a small case of a bacterial infection. Before I got my period I had that like fishy smell that everyone says becomes a problem when you have a bacterial infection but then it sort of went away and now it just kind of smells off. So I was wondering 1.) do I take antibiotics for it or should I let it go away on it’s own since it seems to be going away sort of? And also 2.) should I still have sex with my boyfriend?