I'm a couple of years older than you and have recently had surgery...my endocrinologist has told me that my lapses of memory are normal and that I should just "give myself time" to get over it. It's scary though isn't it?
Just relax ..... we all misplace things, etc. I think it is because most people today are so rushed and stressed. You're okay....if something is REALLY wrong others will let you know. Just continue to enjoy your coworkers and your job. Hugs......B