Tests??

Depends on the person, I was diagnosed from a barium enema then a colonoscopy. Colonoscopies are considered the gold standard, however Crohn's can appear anywhere from mouth to anus, so it won't necessarily pick it up. I also had an endoscopy prior to my diagnosis (came back normal). A SBFT or a pill cam can be the only way to diagnose in someone who only has Crohn's in their small intestine.

Pancreatitis is commonly associated with SIBO (Small Intestinal Bacterial Overgrowth) due to the slowing of peristalsis resulting from incomplete digestion of food (due to insufficient pancreatic enzymes). (see: PubMed)

The overgrowth of common gut bacteria can result in the bacteria infiltrating the pancreas and perpetuating the problem. The abstract linked to above cited 13 of 14 chronic pancreatitis patients as having SIBO, so it is very likely that you have it. I don't know if you are being treated for your pancreatitis, but you should ask about SIBO and get treatment for that as well. SIBO by itself has a number of bad symptoms besides being a likely cause of continuing your pancreatitis.

That said, several of your symptoms have been known to be extra-intestinal manifestations of Crohn's. The bone/joint pain, eye pain, spine soreness, fatigue, dizziness and even migraines have been related to Crohn's. Some people have a hard time getting a diagnosis - it may take persistence to get the pill cam test to check your small intestine, but that sounds like the likely place to find it for you.