Hi Sara and Congratulations to you!
I donated to my husband on October of 2009. While I felt great for someone who had just donated a kidney, I most certainly had some aches and pains. In my case, about a day and a half after surgery, the gas pains started for me. That first day of the gas pains, oh my goodness, it hurt. This was from the gas they pump in during the surgery, and it was letting me know it was still there. The best thing to do to help this is to walk. Which I guess was good because I could not find a comfortable position no matter what I tried. The first day of this was the worst. Each day got gradually better and finally after several days, that subsided. I also developled a very stubborn rash that took quite a while to clear up. Then, about 2 weeks after the surgery, my left arm just above my wrist became very sore. Then the next day, I noticed I had a bump there. Turns out I developed thombophlebitis, This is a blood clot in the vein, in my case they said was from the 2 IV's I had in that arm while in the hopsital. This went away on it's own and I am fine. I also want to say that none of this ever made me regret donating even once. I would so do it again in a heartbeat.
Your body has gone through a major surgery, and is adjusting to now having one kidney verses two. It is very normal to have some pain and discomfort. I would definitely suggest keeping in close contact with your medical team, and most certainly ask about anything that seems unusual, but otherwise, pamper yourself. You deserve it!
Linda