What Causes Urine Holding Sensation In Penis?

i am 28 and i had sex with an older female(48) last friday and she said she was clean and it was protected sex but the condom broke in the process and i have been real nervous after that because i have been feeling a sensation in my penis like you get when you hold your urine for to long. i have no pain when urinating or discharge from my penis and i went and took a std test this past wednesdy and my results wont be ready until friday july 23 could this be from me being nervous and scared or could it be something