Some of the advises are good. I would recommend physical activity, like gym and outdoor. Sunlight has wonderful impact on depression and anxiety. Now if you live in the northern hemisphere, fall is a great time to go outdoor. Find a park, forest, or natural area, where you can spent several hours.
I would be hesitant to use over the counter supplements. However, you should see your medical professional and he make advice you to take some medication dealing with anxiety. It is always good to have issues under the care of professional. There is absolutely nothing wrong to seek out doctor and help.