Jumping during 3rd trimester(?)

Hi mummies, i'm currently 30 week 4 days. It just only happened... I was walking down the stairs and i almost tripped on my pants(palazzo pants) Almost fell 2 steps down face down but i broke my fall by jumping down 2 steps down instead.. Currently feeling extreme pain in my c-section scar and bottom abdomen. Dont know if i should check in. Its my 4th pregnancy and this never happen before...