I Have Been Having Moderate To Sever Pain Going From

I have been having moderate to sever pain going from my hips traveling thru my legs all the way to my toes. It is continuous pain for days at a time. It happened once before months ago after I had a C-section and a gallbladder removal. That time it lasted a hole week. And eventually went away on its own. Now months later it is happening again and I am going on the third day of continuous pain.