My bf smells and now I smell.

Idk if im paranoid but my bf used to NOT smell down there. When I give him oral and go near his balls …it smells …

I can’t explain the smell but its kinda like bad sweat? Stingy odor!!!

Now I noticed my discharge smells and I have to shower to make the itch go away. Itchiness is only at night or if I don’t change my pantiliner in less than 5 hours. My discharge smells like strong ammonia not fishy.

What could it be? How can I bring it up to me bf