Please Help Find

Hi I am looking for a story involving Bella and Edward. They are friends with benefits and they get really jealous of one another. Bella is Emmett's sister I think and she lives with Alice. I think Edward is a doctor or pre-med but I'm not too sure. They find out Bella's pregnant and Edward gets angry and leaves but comes back that same night. I'm sorry there isn't much else I remember. I'm pretty sure this story was called Friends with Benefits but I can't seem to find it.