How the...? I dont even know

Interesting, and super confusing turn of events for me irl. I was scaping last night, and I got up to hit the head before going to bed. As I swung my legs out of bed, i felt a crippling pain in my lower back, close to my spine. I couldnt move and just collapsed to the groud. I laid there for a good hour before the pain diminished enough to get up and climb back into bed. I slept horribly due to the fact that every time I moved pain shot through my entire back. I thought it would go away, or atleast be manageable in the morning and after a nice hot shower. So I went to school for my first class. My back ended up still hurting horribly, so I came home and here I am. It sucks, and I can barely move, but on the bright side, it gives me more scaping time, and I also get more time to finished the homework I loathe doing.

Still confused about what I did to my back, but my dad had something similar a couple weeks ago, and my mom about 4 months ago. None of us know what it is, but it should go away.