Hi @pom, you can find grounding techniques at https://www.lifeline.org.au/get-help/support-toolkit/techniques-and-guides/finding-relief-through-grounding-techniques
My go-to for anxiety is focussing on the present moment. We can't change the past, we can only learn from it. Nobody knows the future. We can worry about a million and one things that may happen, but only one thing will happen next - and in my experience that thing comes out of left field, something that we hadn't thought of to worry about. So we worry about a million things that are never going to happen, which robs us of valuable living time in the present moment. Life is now, the present moment, take the time to savour it. When you know what the score is with whatever happens tomorrow, you will deal with it like you've dealt with everything else in life up to now. Until you know what you are dealing with, get on with living life today. Sure, have a plan and goals, but make sure to "smell the roses" and do something to enjoy life each day.
Another resource for anxiety is ARCVIC https://arcvic.org.au
Have you had counselling to address the root causes of your depression? Antidepressants can treat the symptoms, but they are not a "cure" and the side effects can be mistaken for worsening depression. The right ones can help you focus on counselling, but mental health is an inexact science and finding the "right" one can be trial-and-error. Quite often, and especially as we get older, we need to address existential questions rather than focussing on brain chemistry. Questions about meaning, purpose, connection and values. Those more intangible things in life that require talking through, reflection, and more time than simply dispensing a pill.
We learn in life through our experiences, both good and bad. That's how we build up wisdom over the years. As we get older, it can help to reflect on how we use that greater life-experience wisdom to help ourselves and others rather than waste it. That can help us find purpose at any age.
Please let us know your thoughts.