When to start exercising

When is it okay to start exercising after you've had a baby? It'll be three weeks since I had my daughter tomorrow. I dont know if I should wait until my 6week check up at the docs to make ssure my uterus is back to normal or what.

I had a c-section and my doctor told me I could start walking as soon as I felt up to it. I'm sure you'd be fine to start some low impact stuff and then ask your doctor at your 6 week appointment.