I am having this problem for 3 days suddenly i had a piching sensation as if sopmeone scratched inside while urination and then within few seconds it subsided

Now in the entire day i drink lot of water and have to urinate frequent all the time i dont get these sensations but sometimes i do speaciall y in themorning the 1st urine is really painfull i get the pinching needle feeling and then it husrt for a minut during this time if i touch or press my penis it also hurts a lot

I have consulted Doc. and he suggested some antibiotics like Uriclear , Galtox400 and one more

is it somrthing to wrry or a simple inferction that will be cleared out