So last night around 2am I woke up with some left rib spasms why?

The most I did yesterday was buy food, diapers and play guitar. (I don’t recall doing anything extraneous on the body) So I have no idea why have very light spasms on my left upper ribs. They don’t hurt at all… but they’re on and off since 2am. Of course I don’t know if they were going off while I was in deep sleep.

Should I be concerned? They feel like normal spasms although I don’t know why this twitch is last so long. It’s doing the morse code every like 30 seconds for maybe 1–2 seconds.