So for the past week or two I've realized that when I sleep on my right side and get up, my left leg…

So for the past week or two I've realized that when I sleep on my right side and get up, my left leg is numb, not like bad but almost like it's asleep and my hip and lower back hurts feeling like I have a butt cramp lol but anyways. Today is lingered and it literally just aches... does anyone know why?