I am a fairly healthy 65 year old woman; my health issues have been mostly orthopedic, e.g. arthritic knees, carpal tunnel issues. The only medication I take is for an underactive thyroid. While on vacation in the mountains this past week, I have noticed an ache in my left abdomen, right next to my hip bone, not lower or upper abdomen. It is nagging, and starting to increase in intensity, thinking I need to make a doctor appointment to investigate the cause?