Very best wishes for your pacemaker fitting, Viktoria. But:
DON'T RUN ROUND DOING THINGS FOR OTHERS! Especially your son, as my Mum used to say "He's big enough, old enough and daft enough..."
You need to follow instructions, take it easy, and gradually build back to your busy normal self. A set-back in the early days can be nasty.
Others on here will agree with me.
We're all thinking of you. Hope your keyboard fingers keep their suppleness!
TY