I have suffered from anxiety problems for many years. Most of them undiagnosed :-( If it's a constant problem, talk to your doctor. That being said , exercise helps me a lot. I also take passion fruit supplements. These seem to help as well. Deep breathing, music( with really loud, really bad singing) , impromptu dance parties with my kid....um trying to think of more. Find a way to laugh. keep a silly picture handy, something that cracks you up at the memory of that moment.
Keep breathing girl!