Help!!!! Unusual discharge

I have been having yellow discharge for a month after I had usex. Tested twice using urine and once swab, negative for yeast, bv, negative for trich, negative for STI.

Why the yellow discharge? No smell, but slightly uncomfortable as it at times tingles if it touches my outer vag/vag opening . No pain when I urinate. No itching. Its odorless.

I will be making an appy to see an obgyn. But wondering if anyone has had these symptoms