Do not worry about your body healing. You will be amazed at what the human body can do.
Personally I think the scary thing is getting my figure back LOL.
Just remember it’ll be a bit of a challenge but hey isn’t that what life is? After all with as many kids as you have whats one more? I mean your experienced and will easily adapt into motherhood with two babies. A mother can do anything for her children even if that means chasing a new walking 1 year old around the house, while nursing the new baby and getting the others ready for school. You will be able to do it.
I think the only advice you can be given by any mother young or old is take some time out for you, just you. Also make sure your husband gets of the TLC time alone to. 🙂