Postpartum 2days

Hi everybody, I am a second time momma now and I need some help. I begged to go home from the hospital early because I missed my two year old son so much it was killing me. I'm supposed to be on bedrest for two weeks and have a 15lbs weight restriction for three weeks. My son thinks his new baby sister is very cute but it not adjusting well to the idea of mom taking care of another baby. Dad is trying as much as he can to keep big brother busy and help me, but all I want to do is bounce back fast so I can be there for my little boy again. It just kills me when he screams and cries for mom but I have to care of my newborn baby girl. I need some tips from you other mommies and second time mommies out there, how do I cope, what can I do to bounce back the quickest, how can I help my son transition into this new role of being a big brother??