first time having sex since i had my son in July!

my husband and i did used a condom last during sex since i am not on birth control since i heard they can cause certain health issues but anyway. Today it feels like i have the urge to pee sorta but i did pee before and after sex. it could just be my urethra a little irratated from fiction from sex. I wouldn't think you can get a urinary tract infection this quick can you? I hope not! I am in another state visiting family and plus getting ready for my older brother wedding Saturday. I just hope what i ask is just normal after sex since i haven't had sex in awhile due to pregnancy. my son is two months old today.