How weird is this (medical question)?

This is new, but very infrequent. Probably been happening for like 6 months now, but only 5 or so times in that period.

What happens is I feel a sensation of movement that feels much like a stomach growl, but in my chest. Within a few minutes I will then have an attack of wet coughing.

I’ve had a chest x-ray within the last few months for unrelated reasons and it showed no sign of pneumonia or anything else unusual.

What gives? Does this happen to anyone else?

I’m not actually super concerned. Just kinda wondering how unusual this is. I’ll bring it up at my next check-up but I’m not likely to make a special trip to the doc about it.