Ultrasound cause bleeding?

Jessica
Went to doctors today for my first tv ultrasound (7 weeks 4 days). Saw the baby and heartbeat of 141. 
4 hours afterwards I have a gushing of bright red blood that soaked my entire underwear. I don't think I'm cramping, but now I believe anything I feel would be bad. 
Has anyone bled (not spotted) after an ultrasound?? 
Edit: I called doctors office and they said it is normal and could have aggravated my cervix and just be bleeding from that and not where the baby is. 
EDIT again: went back to doctors and have Sub-chorionic hemorrhage. Just a coincidence I guess it happened on same day as ultrasound.