Suggest Treatment For Severe Stomach Pain

I had an EGD with EUS and FNA about 18 hours ago. When awakening in recovery I had severe stomach pain for which I was given dilaudid (sp?). It helped a little and I was released. Since then I have suffered with severe stomach pain (out of 1-10, this is a 12!!) continuously. My Rx of hydrocodon-acetaminophen has not helped at all. I was told that I may suffer discomfort due to air having been pumped in during the procedure. How long should I have to stand this pain? Will it finally go away? Thank you