I am sorry that your cat died. Ours died last year,19 years old ,a good girl too. Our dog ,13 years old,died as well and she was so easy and so well behaved.That was within a few months.
I am feeling happier now .It seems many of us have these down times.
I hope you are happy with whatever you decide regarding surgery.This makes me realise that I am fortunate that I did not have to face that .