Correction: burning sensation***
I am by no means an expert but in my searching online, burning while urinating and redness around the opening could be urethritis (https://www.webmd.com/a-to-z-guides/urethritis-symptoms-causes-treatments#1). If I were you, I'd go get tested for Chlamydia and Gonorreah as they can both cause urethritis.
thanks for responding. iv already tested and came clean. What other tests should I do? if antibiotics were the cure, it is normal for it takes that long to work or does it usually work from the first time you take it.