Hi sistergoldenhair,
having to cope with dysfunctional behavior it is difficult for all of us. And when things are difficult we tend sometime to resort to dysfunctional behavior as well. If this goes on for a long while one starts doubting oneself. As you are in your 3rd marriage some self questioning certainly is normal and healthy.
It helps to reach out to some friends or a professional therapist to check whether you lost your bearings or whether your head is dizzy as the world has been spinning too fast around you. From what you wrote there are some patterns in your life that sound self defeating. Fixing them could be worthwhile in any case.
Self-defeating, I may be the poster child! I am feeling better. Had a two week bout of pneumonia and finally got out of the house today.