Life after 15 years of caregiving 24-7. After 15 years of 24-7 caregiving, I have lost myself and my purpose in life. I was caring for ny mom, dad and husband. My Dad died in 2006. My Mom died in 2013. Now it is my husband and myself. He has episodes of atrial flutter, but they are infrequent now. I know the things I should do, but just can't get motivated. My two best friends just moved to cities far away. We have four cats we look after. Reading is a hobby. I had a total knee replacement in 2011 and have fallen three times since then. Just a lot of problems with both legs. I was told I should not walk as an exercise because of inflamed tendon in my left foot.
If you love reading, I highly recommend a book club. Book stores and libraries sponsor them (as well as private groups of neighbors, fellow graduates, mystery lovers, etc.)
I also recommend volunteering in the schools. Even with no advanced degrees, anyone could help in elementary school. Boy, that feels worthwhile!
When they say don't walk, I bet you could and should walk short distances. Walk past the three houses next to yours and back. Even walking all the aisles in the supermarket is exercise, but probably not enough to cause trouble. Start small. though, and check with your doctor.
As Jeanne says, take it slow and don't get down on yourself.
You've been through the wringer with grief and loss, and the other thing to do is give yourself time. Baby steps towards a better, fuller life are absolutely fine.