30 Year Old with 2 kids just got my MM!

I have two kids ages 3 and 2. Only 14 months apart. Pregnancy destroyed by body. My sweet and supportive husband got me this MM which included TT, BL, BA. Don't have nag before pics sorry. But I had 34FF saggy breasts, stretch marks and saggy skin on my stomach. 5'3" about 150 pounds. So fat I'm discouraged. I am only one week out from surgery. She couldn't get rid of all the stretch marks which I'm bummed about. My belly button doesn't look centered and I hope that's just because of the swelling! Any advice out there? This WILL get better right?!
First three days post op wetter
Torture. Turned a corner the fourth day and felt much better. Got drains removed yesterday.

I notice a change every day. Swelling is still bad. If I haven't mentioned it before I got 230cc silicone implants subglandular. Dr said I had enough breast tissue (I had 34FF!) and she was putting small implants in for fullness. I love my PS. She is amazing and so are the staff. They have called several times just to check on me.
I was wondering if anybody has done the marble trick? If it worked and how soon should I start it? That's where you tape a marble in your belly button for like 12 hours once a day to mold it into a good shape. Any advice on that?
Wish so bad I had before photos. It was mostly just saggy skin and boobs tho.

Pain was awful for the first three days. Those drains were so uncomfortable. But I was never hunched over too bad. I have walked nearly straight from day one! I just get exhausted easily. I need a nap every day and the littlest things get me so out of breath! I was even good about working out. So be prepared
For that!