I think many people will relate to your post ethel. Two psychologists have told me (when I echoed some of your sentiments to them about regrets and a wasted life) told me that it is the one thing they hear a lot from women.
I am 57 so, close to your age and maybe we were born on the cusp, so to speak, of women being expected to have the main career of housewife and mother and then to 'potter' doing something else as well as compared to today's young women who have been encouraged to go for a career to match any man; that is bound to set us thinking 'what if'.
Being valued for what you do means so much.
To me, those are the wisest words on this thread so far - if you are made to feel valued for what you do, you will feel good about what you do.
I kept it secret thinking that I would be looked down upon as a cleaner.
I would love to be good looking, confident or just have a good job so that someone somewhere will be envious.
Aren't those thoughts a product of the way our society functions? I think they are so I am not surprised that people can feel that way. I remember reading an article, many, many years ago, about cleaners going on strike in America. Their grievance was pay and, to an extent, attitude towards them. Within a few days, that area of America (according to the article) almost ground to a halt as everything became unsanitary; they got their pay rise and, I'm sure, a measure of deserved respect for their efforts.
We can't turn back the clock unfortunately but do try and make the most of what you have which, you will find, is often more than you think.