Can't help with your female dog but we had our male dog neutered last Wednesday and I was worried about what to expect but he was fine really. He was very sleepy on the Wednesday afternoon and did not do much at all. He was better on the Thursday but obviously a little sore. On the Friday he seemed to be back to his normal self.
He need to wear an Elizabethean collar for a couple of days but apart from that all was well. He had to kept on a lead for a week and today was his first day off and he had a whale of a time running around with his friends and swimming in the Thames.
Good luck