Would someone please tell me it won't always be like this?

I mostly suffer from general anxiety. But for the past week I have been (what feels like) constantly on the verge of a panic attack. It's so hard to take. I had a CBT session yesterday and it was determined that my parents (namely my mother) should just leave me alone when I am panicking, even if I am curled up in a ball unable to do anything. That's scary enough in itself, but what if I just stay like that? If my brain was going to realise there's nothing to worry about, surely it would have by now? I feel like the only way to deal with this is to die. But I am a coward. So I need to try and stay calm. But it's so hard. Especially at home by myself at the moment (I am currently living with my ex until the end of the month, but might as well be alone).