Michelle

Trust me, you do not want to "get used" to a feeding tube. However you can and will learn to live with one for what should be a relatively short time. YES, sleeping while propped up with pillows does indeed work for me and my feeding tube.
I sleep the "sleep of the just" now ( I used to say sleep like a baby until I became a parent and my baby woke up several times during the night and cried).
The pain should subside very quickly. If it does not, don't be bashful about going back to the doctors. Sometimes the pigtail or balloon inside gets embedded in the stomach wall, or else they have the tube too tight. Lots of posts here on the daily hassles of a feeding tube. However the majority of OCF posters seem to sail right through with their PEGs so here's hoping you do too.
Charm