It sounds to me like full blown panic attacks or angsiety attacks what are you doing when they come on are you around alot of people or stressing about something going on at work, or in your private life? these are all things that could be causing you to have attacks, if so you can be proscribed a medication you would take prior to an attack or while it is happening.
Thats the other thing. They don't last long enough. 10 minutes tops, the closest hospitol is a 20 minute drive from me.
I really think you need to see a doctor or go to an ER when these attacks happen to rule out heart disease/attack or any potentially serious problem, such as GI issues. I hope it is just cramps, but wish you would have it checked out.