JaseinOC saidI was considering it could be from my hip injury... but this is just so random. I have been doing lots of bike riding training for tomorrow's 150 mile bike ride too. So was thinking maybe something to do with that? But I don't know. It is just so weird to me so figured I'd see if any other people had similar experiences then with them could try figuring out common causes or similarities.
I'd been having back problems from the 1970s, due to motorcycle accidents and "wear & tear" from the Army. In 1981 I was taking my 6-month-long Officer Advanced Course (OAC) for Military Police, which involved sitting all day at long tables in the classroom, in straight-backed office chairs.
Suddenly one day, without warning, I felt I'd spilled warm coffee on my left leg as I sat. But my cup was undisturbed on the table, and my uniform trousers were dry. I kept feeling the fabric for wetness, because that's what my leg felt, along with a strange tingling, half-numbness I'd never experienced before.
For days this feeling kept returning whenever I was sitting in class, until finally I went to see an Army doctor. He couldn't figure out what it was, so he told me not to worry about it (typical response).
The warm, wet sensation finally went away after about 6 months, leaving a general numbness that remains to this day. Over the years I've been given all kinds of fancy names and reasons why I have this, by numerous doctors (Army, VA & private), some saying it's due to my bad lower back, others that it has to do with my hip joint. Bottom line is I still don't know, so I just live with it, but not a big deal, actually.
As I originally wrote here, and others have said, see a doctor. But you asked if any of us had experienced something similar, and I may have.