Tear in wall/lining of womb??

Niamh
Hey everyone,
I went to hospital today due to a minor bleed, spoke with a lovely doctor you preformed a speculum and had a good look up there and said it was due to a little tear in the wall of the womb? She said it is quiet common and checked baby and everything else was fine. She seemed happy that all was okay and so was I.. UNTIL I went home and looked up tear in lining of womb and is apparently a life threatening condition? I'm so confused? Was I diagnosed with this? Was the doctor wrong? She would of hardly letting me go if I was having a uterine rupture?? HELP!!!