Hi Doctor, I am currently 5 months postpartum and had a C-section delivery. For the past 15 days, I have been experiencing lower back pain. To get some relief, I started doing a few core-strengthening exercises such as bridge pose and cat-cow stretches. However, for the past 5 days, I have been having significant pain in my left leg, starting from the buttock and radiating down the back of the leg up to the ankle. The pain becomes worse while sitting and climbing stairs, while at other times it is manageable. Could you please suggest what this might be and what I should do next?