One or more of your meds may be losing effectiveness (tho unlikely after 1 year). Meds or stress can very much affect memory and momentary lapses. Do tell your doc about these things as they may or may not be due to meds or stress or another condition.

On the other hand I know that having too much on your mind at one time can cause forgetfulness or "brain farts". I'm nowhere near normal, but it's been over 40 years since I've used my maiden name and I still want to sign it sometimes. I don't work so I don't purposely keep track of the day of the week or date. I recently went to see a new Pdoc, and he did the general questions to see if one is dealing with reality. He asked me the date, and I said...uh....June 9th or 10th? It was the 8th. If he thought I was insane, he didn't say. lol