37 weeks pregnant w/terrible back pain!

My back is soooooo very messed up. It's to the point where I can't walk or even sit normal. At times I almost feel like my bones are going to snap. The pain is so intense. I talked to my doctor and she told me that since I'm 37 weeks I'm too far along to get an adjustment at the chiropractor and she also told me I can't take anything but Tylenol. I literally don't even know how I can make it three more weeks! Do any of you have back pain? Any suggestions? Every night I'm taking an epsom salt bath and also laying on a heating pad. I seriously need relief  during the day though. I'm so close to taking another kind of medicine against my doctor's wishes. 😩