Recover and growth

Recently going through empty nesting and feeling what is my purpose now. Thanks to Virgin, I read that exercise and meditation can relieve the anger, guilt, and stress. Anger because I feel lonely (single parent), guilt because I feel abandoned (was I a horrible parent), and stress due to another crisis (naturally occurring). I understand it’s a good thing to have a young adult child who can be independent (not 100% financially) and can begin to spread her wings and “adult”. I started going to the gym and praying a lot. Hoping for recovery and growth.