ultrasounds

hi ladies i just went for my 20 week ultrasound on monday i found the tech was pretty aggressive i was in pain half the time and feel like my lower stomach is a giant bruise i cant touch it when i bend certain way it hurts. im not bleeding or anything just feel bruised should i be getting checked or not worry about it this is day 3 of bruised feeling. i dont see my ob again til the 28th. this is my 2nd pregnancy and never have i been in pain from an ultrasound before. thanks for the advice.