early pregnancy symptoms or uti??

my bf came inside me on the 29th of august, last day of my ovulation. took plan b 30 mins later, had headaches for the next few days then got my period (?) on the 4th of september, although is was super light and only lasted 4 days. usually my periods can be heavy and last 6 days. if i were to have my usual cycle, i would be 6 days late as of today.

now i am experiencing what feels like a uti, having an urge to pee every hour with sometimes little to nothing coming out, my bladder feeling like it’s never fully emptied, cramps in my abdomen, but NO burning. however i also know this could be early pregnancy symptoms, but i think i got my period? help please!