If you are still experiencing discomfort you may need to have some diagnostic tests to determine what is going on. Have they sent you for a CT scan and have you had a physical exam by a surgeon to check for hernia, fluid under the skin (seroma) or any other abnormality? I am also a little concerned about the prescription for Advil which is an NSAID which is not recommended for long term use for patients with one kidney. You say you are using pain meds around the clock so do be careful with the dosage. do you have your own family physician to contact for a second opinion?
If the transplant center doctors say they have never seen this, I wonder how many living donations they have done and if donors are able to come back to them for follow up or do they just send them back to their own doctors? While complications are not the majority any surgeon who has removed any organ from a patient laprascopically or otherwise must have seen some patients come back with complications which need to be addressed.
Keep us posted. Sorry I missed this post originally.
Sherri