Self-winding watches will stop if taken off and stored for a period of time. When this happens, the next time you wear the watch you may need to wind it in order for it to stay running. Yes I said wind your auto-winding watch!
So before you head to jeweler for a watch repair, take a look at this How To Wind A Self-Winding Watch video.
Other Videos of Interest:
When An Ounce of Gold Isn’t Worth An Ounce of Gold
OMG! My Diamond Turned Blue
How To Get The Most Out Of Selling Your Gold Jewelry
Your post captures the issue pelerctfy!