I am no therapist or spiritual director. I am just sharing what has been helpful in my own walk. Take and leave whatever you want.
Also, when talking about a Saint's experience with anxiety, intrusive thoughts, panick attacks or depression it is definitly not my intention to undermine the mystical experiences of the Saints. Whether their experiences were signs of mental illnesses or of a spiritual attack we might never know. Yet whatever they were the Saints lived through those experiences with unwavering Faith, Hope and Love. Their experiences are similar to that of people struggling with mental illnesses yet not the same. Still I believe we can live through them with the same Heroic Virtue.