loose skin?

I was so small before I got pregnant, around 110 lbs, and ended up ballooning up to about 170 lbs during my pregnancy, && gained it ALL in my stomach. I was small everywhere else still, and now that I've had Rylee my skin is kind of loose. I had a c section so I can't do any serious exercising for about 6 weeks.
Are there any low impact exercises that you ladies know of that I can start doing now until I can do more vigorous exercises later on?

Some sort of post-partem yoga?

i was exactly like you, i was 105 before i got pregnant and 2 days before i had my son i was 162. its been 2months since my son was born, i had a c section also. just walk, thats all ive been doing, and it reaaaalllly helped alot. ooh and wear a post partum brace that helps alot too!!!! now im 120