I'm a big fan of Pilates. You should try it, it's a great work out and will really tone you! Just be aware that majority of the moves focus on your "core" and work your abs. I also take a lot of dance classes and just started getting into yoga. I think working out when you feel up to it will definitely help you feel better and keep your mind off other things :)
24 Female - Dx Crohn's 4/28/08 - Pentasa 4 pills/2x day