Need to Mourn

I am 55 and have been married 37 years, both of us unfaithful. Nine years ago I thought we were going to try (to stay together), he never did and stayed unfaithful. I have cared for my mother as long as I can remember. She just died on July 9, 2019 due to an ALF administering a powerful drug that destroyed her cognitive abilities. He asked for a divorce in December, 2018, and is with a 30 year with five kids. I have been so involved with moms process and death that I am now dealing with so many emotions. I’m so depressed in every aspect. Yet, I know God is faithful to fill me again but I can’t feel anything.