It's worth noting that syntocinon only stops blood loss from the uterus by causing it to contract. giving it to stop you bleeding from tears is ineffective.
What I meant in my previous post was that my obs wanted to have the placenta birthed so that he could stitch up my tears. I guess you can't stitch tears till the placenta has been birthed (I had requested that they wait to see if the placenta would be birthed naturally).