UTI and Discharge

I went to the doctor today Bc I have been experiencing a burning sensation and yellow/brownish discharge. Turns out I have a UTI. My vulva has been very irritated. I treated myself with monistat and that cleared up. But I only went to the doctor today because of the strange discharge. I also got tested for all STDs just in case. But Im not very concerned about that because I haven't had unprotected sex. Has anyone experienced discolored discharge along with a UTI? I'm concerned. I start antibiotics tomorrow.