I can recommend:

Martha Weiss, a therapist specialising in anxiety, and she is in Boston
The website MoodGym
Breathing exercises - in through the nose out through the mouth 3 times
A bath
Yoga
Going jogging
Boston Anxiety Therapist - Fears Therapist Boston, Suffolk County, Massachusetts (MA) - Anxiety Counseling Boston
Kati Morton is a Youtuber therapist who has some great videos on coping with anxiety
Mindfulness - google it for good anxiety techniques