I can realise that you have very tough times these days but these pain killer can lead to several side effets if taken for long duration in high doses as all of these cantain one or other narcotic group of drugs.
for management of crohn's disease you can take salazopyrine or mesalazine, metronidazole
, iron ,vit B12, folic acid,an deven prednisolone
but all under the guidance of a physician , you should keep on getting complete blood count
regularly, you can even go for immunotherapy
if above mentioned therapy fails.
wish you all the best.