My Grandson had ruptured appendix and emergency surgery 2 and half weeks ago , he s been home 1 week . He has not bounced back , he has severe Diarrhea and tummy pain ..we were told after surgery and when we left hospital , he was at super high risk for another abscess forming for up to 5 weeks out . Should I be concerned , he just don t have energy , lays all time , can t attend school ?