How do you take your Crohn's meds if your stomach is flaring up?

I have a stomach flare up or to be more accurate a gastritis flare up. I vomit, am nauseated and my stomach hurts very much. I know this feeling very well. Food makes things worse so I just take Ensure to be able to push Nexium, an anti-ulcer drug and Entocort. But I'm flaring after 4 days of skipping Pentasa, Rifaximin and the probiotic. Since two months, I have started a colitis flare up so I can't bear skipping meds. How do you take your oral meds if you are 100% sure you will vomit them and your stomach will hurt more? Def I'll try to see my GI but till then I need some advice.
Your replies are highly appreciated.

When things get that bad I usually end up in the ER. Where they pump me full of fluids, and meds to stop the pain and vomiting. If your not able to get and keep your meds down might be something you need to do too.