Loose skin ... 😕

Heather🐼 • Baby girl Talia Noelle born 9/3/15. 7lbs, 20 inches long.
Anyone know ways to firm up loose skin? I am 5 weeks PP (c-sec) and have a lot of stretch marks too. My skin is so tender and itchy. I can't do excersizes yet - might have a hernia. I had a very large baby bump from too much amniotic fluid. It was twin sized.