I`m sure your doc is scared but if you really only use it when in need, as long as it`s not often, I would continue.As hard as it may be , try not to be fearful cause that is what stops us from doing all the things we love. on having an attack, I really try to take an I DON`T CARE attitude. I actually talk to the sensation when it comes saying you won`t kill me, I won`t die so if you have to come I`m not going to let you get to me. I know this sounds really weird but it really works for me. For me, the more I feared, the worse it was. I hope you feel better & DO NOT let it get the best of you!