Don't panic. Stress can be a huge culprit when it comes to memory problems, as can medications, infections and sleep deprivation. So it's important to take a realistic look at your situation. If you always mess up when you balance your checkbook, you probably shouldn't be too concerned if you do it again. However, if you are an accountant and the numbers no longer make sense, then it's time to consider a checkup.
The same thing goes for activities like cooking. If you are a casual cook but your meals aren't as tasty as usual, it's probably just because you are rushing and not paying attention. Maybe you're tired or distracted by your care receiver's health. But if cooking is your major form of relaxation, and you find creative joy in making meals, yet are habitually messing them up, you may want to question why.