Assuming you didn't start taking or switched a medication before this began, or that you are not at risk of dementia, it is possible that your forgetfulness is anxiety related. When we are anxious (or depressed) the higher brain centers can be overloaded by inputs from non conscious brain regions like the amygdalae. So being scared of forgetting can become self fulfilling. But it could also be simply preoccupation.
Given this has been happening for a couple of months I suggest you talk to your doctor about it.
NOTE: I am not a doctor, and more importantly, I'm not your doctor so the above advice is necessarily of a general nature which may or may not apply to you. Always consult your health provider before acting on anything you've read here.
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