Double whammy there with huge pain and no exercise - it cannot last forever.
You've probably heard the wonders of the starch-free diet so i'll just leave it as a solid recommendation.
However, the quickest way to ease pain for me has always been a fast. Just stopping all food and drinking quality fluids - water or weak tea.
Good fruit juice is an alternative if the lower energy levels make life impossible.
Most people can respond to the strach-free, but almost everyone responds to fasting. It won't hurt your acne either.
Three days is a good start.
Ted
I've got Crohn’s disease...
...and he's got mine...Spike Milligan