Not necessary. Little exercise and proper diet may be of help. Well exercising and being mindful of your diet will help. There are all postpartum girdles that can be worn to get you back in shape. Best of luck

It's advisable to see a doctor asap.

You can try exercise if you gave birth naturally with CS. Gentle Start-Up

U need to give yourself time, ur uterus will return to its pre pregnancy state by 6 weeks. Than u can know d exact size of your tummy and start Working on it by doing some tummy exercises, reducing ur sugar and carbs intake, taking plenty of water and eating lots of vegetables.