UTI, dehydration or drinking pure chilly sauce have caused that burning sensation in me.
Drink more water.
Sometimes the test doesn't detect an infection until it's really bad. Or as my doc suggested once - you feel the burning, schedule the appointment and it clears up before they get a sample.
The way my Uro handled it was to give me a Lab order (good for up to 1 year) and some specimen cups. If I were to have persistent burning/painful urnination, I was to pee in one of the cups he gave me and drop it off at the lab. That way he would have a sample right a way. I never not got a chance to use it before the Lab order expired because the burning sensation never lasted for more than one or two visits to the toilet.
Age 60, 58@Dx
PreBx PSAs: 8/19/16 - 71.4, 10/03/16 - 87.3
Bx: 10/12/2016, T1C, 31cc, 3 of 14 G7(4+3)
11/16 bone scan - no mets
Tx: 2/15/2017 - 4/17/2017, 44 IMRT, Whole Pelvis 45 Gy, Prostate Boost 34.2 Gy, total 79.2 Gy
ADT(Lupron) 11/16 - 11/18 (last inj. 5/23/18)
PostTx PSAs: 8/17 - 12/18 <0.1