worried about stopping progesterone injections at 12 weeks

Jade
I have been having weekly progesterone injections since 5 weeks. I am 10 weeks now. I am supposed to have my last injection at 12 weeks. I have read stories of women losing their baby after stopping progesterone shots and i am very uneasy about it! Can anyone share experiences, suggestions or thoughts with me? *I know the placenta is suppose to take over at 12 weeks!! However those women who lost their babies after stopping the injections were told the same thing. I have a history of recurrent miscarriage and this is the furthest I've ever made it in a pregnancy. It would absolutely kill me to lose this one after making it this far.