I am always anxious and have been this way for the last 7 years. What can I do to get a break from this anxiety?
Talking with a therapist around this issue may be helpful or even attending a Hospice grief group. In working with a therapist it would be helpful to that person (& to you), if you can identify what patterns emerge around specific types of anxieties and what may trigger them. Looking at changes before and then after your mother's passing in your behaviors, thoughts, routines, might provide some clues. It might be helpful to remember that many people have deep feelings around a major loss, so that you might look at this as a normal reaction that is deserving of fully processing.
Do you take time for regular self-care? Does the anxiety affect your sleep?
Do you try to find reasonable life/work balance? These are points you might want to discuss with a therapist. You might consider mindfulness based meditation, positive visual imagery, regular exercise, eating healthy, and finding regular moments of joy and purpose. You can also visit online the U.C. Berkeley Greater Good Science Center for many helpful articles, videos, classes on positive psychology and related concepts around reducing anxiety.
Good luck to you and your reaching out is an excellent start.