Miserable 20 month old after tonsil, adenoid and tube surgery?

My 20 month old had his tonsils and adenoids removed and tubes put in yesterday morning. He is crying nonstop (I can only imagine how painful it must be). Something just seems off, consider maternal extinct, I am just concerned because he cries even after the tylenol with codeine is given to him? has anyone experienced this and is there anything that could be wrong? I am waiting to hear back from his surgeon but anything in the meantime would be helpful. I am thinking one of his tubes may be blocked?