Unsure what to do

On August 1, 2020 my unborn son decided he was gonna drop while I was sitting on the toilet going pee and it was so strong when he dropped that he knocked me off the toilet onto the floor. Since 1130am yesterday I have been having intense pelvic pressure as if my pelvic is opening for birth and intense pain in my stomach which I think could possibly be the start of extreme preterm labor since I'm gonna be 33weeks prego this Thursday August 6 which I go to see my OBGYN that morning at 830am for my normal appointment n then a growth scan. My water hasn't broken at all yet but is it normal to have real contractions even though you haven't lost your mucus plug and your water hasn't broken with being almost 33wks prego