I had gone for years with one one here and other and then this past summer I was under a lot of stress and had lost my outlet. I was having one to several every day. It was terrible. So bad, in fact, I even passed up applying for a job I really wanted because I knew I'd have a panic attack during the interview and forever ruin my chances with that company. I must say I am improving. I have only had a couple in the past months and they weren't as severe as they had been. Hopefully they will become a thing of the past again