Std advice

I had sex with a new partner two weeks before Thanksgiving of 2019, we also had sex the first week in December. The last time having sex with him I had a fishy smell and consistent discharge. Lately it’s been at the end of the month after my period I will have this fishy smelling, thin, discharge. Nonetheless, I had testing done December 11th at planned parenthood and I was clean. I had a gyno appointment January 2nd and everything came back clean, and then lastly I was tested January 25th and was clean. Yet, I’m still having this off white discharge, some spotting after my period ends, and it’s freaking me out. This person told me he was tested and came back clean and now I’m trying to figure out if it’s Bacterial vaginosis or syphilis. I have no bumps, no rashes, literally nothing but I’m freaking out. Any advice? Or should I make another appointment? I’m just so sick of tests and still dealing with this shit. I’m on birth control and I am 20. It’s been really messing with my mental.. I feel so disgusting, I don’t even want to be touched.. it feels like it will never go away..Thanks a lot