Help! Am I sweating or is it urine or a discharge?

For the past few weeks, my underwear has been getting wet. I don't feel myself peeing or any but maybe I just can't feel it? Or maybe a discharge. There's no color to it. I tried shaving because I thought I was sweating but it didn't seem to make a difference. It has a weird smell to it. It smells almost sweet but also sour? I don't know if that makes sense? I was just into the doctor and had a pap smear and whatnot. he said it looks good so I must not have an infection. So, what are your thoughts? Has anybody else experienced this?