Hi Chelsea,
You will be sore for a bit, but just take it easy if you can. I found that putting an ice pack on my abdomen helped a bit. The nurses in the hospital suggested that. The gas pain will go away as well, walk around and move as much as you can tolerate as it will help move the gas outta there! Do not stress so much about the Fluid, just sip all the time. You will be able to increase it each day. I know it seems like you are drinking a swimming pool full of water! (at least it did for me).
The good news is that each day gets a little easier Hang in there and relax when you can. Good Luck to you!!