Hi there. I just got a PEG tube inserted myself about 3-4 weeks ago. I was somewhat surprised as to how its done - you can get an endoscopy/colonoscopy at the same time, and when you wake up, you've got the PEG tube. The pain from the surgery wasnt too bad as its a small incision.
Basically you dont feel fluid actually going into your stomach but you do start to feel full especially if you do it fast. I dont know what type of feedings you are going to be doing, but they might give you a pump that you can run during the night. You need to make sure you get the proper type of nutrition supplement depending on your needs. I take Peptamen 1.5 which is a high calorie, high protein one. Be aware that these are extremely expensive if you dont have insurance.
Why are you having a feeding tube? Can you not eat by mouth? You should be aware that since the food is going into the stomach, its exactly the same as eating it by mouth, so any nausea or stomach pain will still be experienced. However, the liquid nutritional supplements are designed to be very easy to digest so usually they will feel a lot better then food.
You can also put other things in your PEG tube if you dont want to drink it by mouth. For instance, I put in a supplement called "Proteinex" that tastes AWFUL but I put it down the PEG tube and dont taste a thing.
If you are able to drink nutritional supplements by mouth, that would ideally be the better route because its the same thing as the PEG tube. The reason I got mine, even though I was eating during the day, was that they wanted to do it overnight for extra nutrition. There are a wide variety of supplements and the best type are elemental type diets with high calorie, high protein.
If you are able to either eat or drink normally that is the best route. However, if you feel you cant drink as much as you require, you can go with the PEG tube, but of course it requires a surgery.
Also, have you discussed the possibility of an NG tube? An NG tube is a tube that runs down your nose into your stomach, just like the PEG tube. The benefit of the NG tube is that you can pull it out any time and thats it. The reason Im not doing it is that they can be difficult to put down your nose yourself and are annoying since you feel it there.
I would definitely recommend you at least give the NG tube a shot because if it doesnt work out you just pull it out and your done. If you want to, you can even put it in every night and then take it out the next day. It all depends on if you can tolerate the feeling of it.