I can tell you the pain is normal. I am also on the pudgy side of things. I did have cramping in other areas of my stomach for a few weeks. That cramping is gone now. I too had that awful smell with the PEG tube, and still do sometimes.
Onto the follow-up with the PEG, I wish I could help you there. I got very lucky and the GI Dr. who put my PEG in gave me his personal cell number if I had any questions. I have seen him a few times in his office without any appt, so he could adjust the tube due to losing weight and the tube getting too lose.
One the nutritional side of using a PEG I have not had any help except for on here.