Pressure?? at 32 weeks 4 days

one day out of the blue i woke up with insane pressure almost uti like but only after i pee and only when i stand up , i went to the doc and currently waiting for my urine culture. but in the meantime they gave me antibiotics which seem to be doing nothing. it’s literally jus feels like i have to pee 24/7, is this just him dropping lower or what?? it’s so uncomfortable and kind of painful as it’s been happening for 2 days today.