Weird smell?

Basically I’m having an abnormal amount (for me anyway) of white discharge. It smells foul, I guess fishy? I honestly don’t know how to describe it.. I took a urine test and swab, it came back as negative for STI’s and the doctor I spoke with said it didn’t detect anything related to BV either. This smell and discharge is not normal for me. It started about 3-4 months ago. I keep good hygiene as well and haven’t put any kind of wash up there or anything.

The only thing different I was doing is that about 3-4 months ago when it started, I was sexually active and on BC pill, so I had let my partner finish in me. I haven’t had sex since as we broke up and I’m too embarrassed about this to have any new partners...

I don’t know what to do as apparently everything came back negative.. it’s a strong smell, I can smell it through my pants sometimes so I’m worried others can too...this is so embarrassing and honestly taking quite a toll on me.. any advice or related comments are much needed :(