Ben pain in iliac crest, worried

Woke up this morning with a deep bone pain in my left iliac crest, outer pelvic bone.First time I've felt pain there and it's unrelenting after taking Aleve. I have arthritis, does anyone know if you can have arthritis on the outside of your pelvic bone? Also haven't been diagnosed but suspect I may have Fibromyalgia. This pain feels like bone pain which is causing me anxiety. Anyone have similar experience or ideas what else it might be?