You are right, you have had more then your share. I am sending you a bushel of (((((((((((Hugs))))))))))))).
With all that you have going on health wise and now two deaths you sound like your in a pretty normal place right now. Your sad :(
That is ok, please let yourself believe that your feelings are due to what is happening in your life right now.
One of the best remedies for anxiety is to talk about it. Here's where good friends and family can come in. The old adage "A problem shared is a problem halved" comes into its own here, and while you may dismiss it as nonsense, it may surprise you how anxiety alleviating it can be to just talk to someone. I hope by coming here and talking about your feelings you feel cared about and not quite so sad or alone.
May you have peace within,