Hey!
There is definatly nothing wrong with changing things up!

It can help to re-motivate you and keep things moving. My advise would be to change up your exercise routine, go to the park and play, or buy one of those cheesey 80's workout videos and get to work

Also... if you arent doing this already drink PLENTY of water and replace empty calories with whole grains, fruits and vegtable.
Hope this helps! Good luck, try to find your motivation