Thanks for writing in.
Your situation might be a rare one where there is mild wound infection
. This cannot be explained all the time but as your doctors have started you on antibiotics, they should work for you.
I do agree that you might be having more pains than usual. This should subside within a week but there will be some pain for a while. You must continue the wound care twice a day under clean precautions. Once the wound closes completely, things will get better and these wound should be healing in 4 to 6 weeks. for faster healing, do not expose wound unless you are doing wound care and protect from dust.
Hope this helps.