It sounds like you may be constipated I would definitly call the GIs office and inform them of what you just told us. Left side pain in a non IBD person typically means constipation sometimes in a patient with IBD it also means C but I would not let this go. The GI may suggest some OTC meds such as stool softeners, miralax or even a suppository or enema but the fact that you cannot keep anything down worries me. If you cannot reach an on call doc at this hour call your primary doc or go to the ER sounds like some tests may be in order being that you cant keep anything down as far as food. If you cannot keep fluids down that is more of an issue try to keep your intake of fluids up, non carbonated prefferably no caffeine either. Your best bet for fluids is water, sports drinks, and decaf tea. But before anything call the doc if they want say a CT done for example asap you cannot have anything by mouth for a set number of hours prior to the test except the CT drink.
Dx with Crohn's 1987, symptoms as early as 1984.
Temp iliostomy February 2007, reversed June 2007, Ovarian cysts, migraines, allergies (incl food allergies) , oral allergy syndrome (diff than true food allergies), Asthma, Gall Bladder removed 1999, Inguenal hernia 1987