After the birth of my 3rd child i have been experiencing pain on the soles of both my feet every morning when i stand up. i can hardly walk.

See a podiatrist: It sounds like you have developed plantar fasciitis.

Sole pain: During the end trimester of pregnancy a hormone is released that allows the ligaments in the body to relax and stretch. At that same time the ligaments in the feet will also relax and stretch. With a tight calf muscle and achilles tendon complex, the bone and joint structures of the feet can fall into misalignment. These alignment problems can cause foot pain consult your podiatrist for a thorough evaluation and diagnosis.