it's not a uti...

So I recently started experiencing a burning sensation when I had to pee so I went to the doctors and they said everything looked okay but they'll send my sample in for further testing. I got a prescription for antibiotics and then two days later... I still feel a slight burning feeling... my Doctor calls and tells me to stop taking the meds and seek an appointment w a gyn. I know you all aren't doctors but has anyone ever experienced the same thing bc I'm so worried it's something bad.