So I Need Advice Or Help Ive Bever Worn Or

So i need advice or help ive bever worn or put a "walking" boot on. The dr didnt show me or tell me the proper way. Every time i try i cant stand the pain or my legs, ankle , and foot throbes and shakes. I have it elevated but it doesnt help and ive taken my pain meds as perscribed but i doubt they are even helping. Idk if im putting this on wrong or if i need to go back to them and say this isnt working something isnt right? Any advice on what i should do. Bcz this pain and throbbing i just cant take much more of it