Single mouse clicks suddenly act like double clicks

All of a sudden whenever I click on a link or anything else, a single click acts like a double click. I adjusted the mouse control panel setting for double click speed to the slowest setting but that doesn’t seem to help so I’m looking for suggestions on how to fix this issue. I’m handicapped and have trouble using my fingers sometimes so I suspect I caused this myself, just looking for a way to undo it. Thanks!