I have had this exact thing happen. Going along, boop boop boop, usual dull aches and all of a sudden it feels like one of my joints, (usually a knee or elbow,) feels as if an ice pick has just been jabbed in. Pain lasts about 3 seconds and is gone completely!
It happens so fast, I've wondered if I imagined it.
Not sure what to do about it either.
You are not alone,
Julie