I find that mine does that when I'm hungry. It suctions back and forth, it is very weird, I never thought to ask because I find that it only does it when I'm needing to eat and then once my belly is full, it stops.

You will find that the PEG does ooze stuff out, putting a drainage gauze underneath it helps.

My first G Tube was a long pig tail that I would just tuck it inside my pants and that usually worked. My new one is a mic-key button which I love because there is no tube hanging from me, it's a small circle (about the size of a nickel) flush against my skin.

I'm a little concerned that it's been a week and you still have pain and cramping. It might be a little sore still but it might be something you want to phone your doc about and see what they say.

Good luck!