would MRI show pregnancy?

Soo.. I had a pelvic MRI, I could have been about 13 weeks pregnant (negative hpts) I didn't have the MRI to check for pregnancy, I had it took look for endometriosis and anything else causing pelvic pain. 
Do you think that the MRI would show pregnancy? And would the doctors have told me... Even though I didn't ask if I was pregnant and they wernt looking for it? 
I would really appreciate any help. I'm very worried.