i find that exercise really helps...ive been dealing w/ anxiety for the past few months and had my first panic attack last week, but ive noticed that when i go for a run, i feel alot better at night...partly because it makes me tired so i fall asleep easier (nighttime is bad for my anxiety) and also because it just allows you to release alot of stress and frustration. it also can help regulate all those hormones esp the adrenaline etc that can get out of whack! hope this helps for you!!