weakness in legs?? Anyone????

I have had this weakness in my legs. Now 1 month post removal. I feel like my legs just ran the 10K. It sorta runs from my lower back across butt to my heels. Mostly in the back side of my upper legs. No tingling, just a deep heaviness weak feeling inside like I could fall out any second. I have had back issues since I started mirena 6 yrs ago, but thought it would ease up more than this by now. I have had problems with sciatica, but this isn't the same.
Has anyone else had this weird issue?