Two of my children had tubes - both at 10 months. The first one to get them was in so much pain before the surgery that she was totally relieved after the surgery. She was drinking pedialite out of a bottle when we went back to recovery and cooing. She didn't want to nurse. Within 2 weeks of the surgery, she was crawling and sleeping through the night. Many of her rseults were immediate. Because of the fluid in her ears, the surgery greatly improved her hearing so the phone, doorbell and creak of the stairs would awaken her when they hadn't been a problem before. Her results were so dramatic, that I said to the ENT "I don't know what you did with the child I gave you, but I'm keeping this one!"
The second child was not as dramatic. She felt fine going into surgery, so she was pretty ticked when she came out. It is very normal for children to cry when they come out of surgery because of how they react to the medication. I really think she was mad at me for about 2 weeks after the surgery. I started to think that she shouldn't have had the surgery. The tubes did the trick with her, too. The changes weren't as dramatic, but she stopped getting infections and finally started sleeping through the night. Before the tubes, she went about a total of 2 weeks without infections in a four month period and absolutely could not sleep at night when her ears were hurting.
Every experience is different, but your child seems to be reacting like my second child. Give him something for pain and if you are worried, call the doctor. They are there for that and can answer your questions.