Today, everything seems to be back to normal. Thankfully. Yesterday, I went out for my usual run and couldn't do it. I had to stop.
I didn't run today but I didn't feel any pain this morning as I went for a gentle walk. I iced my back twice yesterday and was diligent about sleeping with a pillow between my knees last night. And, today, so far so good.
I don't usually have back pain. Not since 2009. Sure, I get reminders if I'm tired or have done too much - a quick zinger down my leg - but I haven't had all-day pain like I did yesterday. I feeling grateful that the pain wasn't worse - or worse, longer.
… But it wouldn't tell me why.