Always best to talk to the doc first, I have used Ativan in the past as it's fast, no side effects for me and always works, I would caution you however, Ativan is addictive and trust me getting off this stuff in my experience was as hard as quitting drinking however I had been on it for years, for me I still take it if the anxiety attack is bad and walking/meditation/yoga doesn't work. So I may take it four times a month tops, some months mothing. Please be aware this medication does to our brain, the same thing as alcohol, it's critical that you do not take it and drink at all. It is meant to be a short term fix, once again in my experience.
All the best
Andrew