There are several ways which can help you with your anxiety, so you may want to try them out to find the one which is the most suitable for you.
For example, some people feel a lot better when they excercise. Moving your body helps you not only burn some calories, but your brain distributes some hormones of "happiness" afterwards, so you feel a lot better than before. If you excercise in nature, you also gain more oxygen, so that's really great as well.
When talking about oxygen - try taking deep breaths. Find at least several minutes in your busy schedule and stop doing whatever you're doing, and focus on your breath. Breathe deeply, fully in, fully out, feel the air filling your lungs.. it may seem a bit silly, but it really does help. It also helps when you're really stressed.
Relaxing music helps a lot, too. Try playing some on youtube, and just relax. You can listen to instrumental music, sounds of nature (rain, storm, birds singing..), anything you like.
Other things I recommend are - doing something creative (drawing, sculpting, ...), eating healthy food (fruits, vegetables) and drinking a lot of water, drinking (herbal) tea, maybe aromatherapy or yoga, etc.