Diane54, sorry to read of your loss, and the way in which you discovered you are not as financially secure as you had anticipated. I hope some of the suggestions already made will be helpful to you.
I have always worked. When my oldest was little in the 70's, I worked from home, typing reports etc. I also worked as a Saturday sales assistant during that period. I did half days from her starting school at 4. I later re-trained, had two more children in the 80's, by which time the world was changing, and decent maternity leave was available.
I was warned by the older women, on starting work at 17, to always pay a full stamp, otherwise I'd be dependent on my husband's pension in later life. This was in 1966, and the older women largely worked in the packing section of the converted mill where I was in the office bit.
The changes to pensions have been the subject of lots of media coverage, and a number of campaigns.