Blood after being checked

Amanda
Hi ladies, 
I just got home from my 38 week ultrasound. I went pee and when I wiped I had a good amount of blood on the paper. I wiped a few more times with blood and a couple of clots. Is this part of the plug or just because she checked me? Should I call? With my first the mucous plug came out all at once very snotty looking and not near as much blood.