Hi Jerissa,
Seems you are fairly new to the forums, welcome.
I empathize greatly with you. I am feeling the same way as of late. BunnySockMonkey is correct in saying you are not alone. This is definitely something we sufferers experience in our lives. Not to mention, you are 66 years old, a time when most people think about the what ifs. Guilt and Regret are a common theme at that stage in life. It has got to be painful to experience.
What helped me with this feeling is to think of all the positive things in life... All the things we DO have. It is so very hard, but it can help.
Out of curiosity, what are the things you would have done differently and what is it specifically that you want in life that you feel you never had?
Life isn't over yet...
Thanks,
HD7970ghz