I know how awful those panic attacks are kaylasmum 
I had an undiagnosed illness that gave me chest pain, sharp pain down my left arm, jaw pain, basically all the signs of a heart attack. I started to think I was dying, then the heart would race, tingle in my hands and feet, nausea, you know the drill. I lost count of the amounts of visits I had to a&e. Even when I finally was diagnosed with fibromyalgia and therefor knew the reasons for this pain were less worrying, I was still in the grip of anxiety. I'd suffered it so long it was part of me. That freaked me out, i could see myself becoming a recluse, staying close to home/hospital in case of the worst case scenario.
CBT didn't make much difference, not long term. What did work was my mum sitting me down and asking me how I intended to stop from ever dying. I couldn't answer her. She was saying, basically, face the fear we all have, no one wants to die, ever, not really. We don't have too much control over it. So, although it was more than likely way off in the future, I was ruining the life I have now, wrecking it, by my anxiety. Well yes, but I feel like you, and no doubt every single mum on here, I don't want to ever be separated from my child. And yet, won't we all, one day? Here I was, wrecking my here and now, with my family, by worrying about the future, which I can't control.
I had to really force myself to learn acceptance. To be mindful of what I love each day and enjoy each second, savour the moment.
Tomorrow, try to pinpoint a moment when you feel good, maybe the kids are making you laugh, or the house is full of warmth and the famly are all around you. Notice the feeling of contentment, savour it, taste it, and say, this is happiness. Now you have comitted a wonderful memory to the bank for when you are old, instead of an anxious moment for when you are lying in bed, awake. The more you have these moments, the less room there is for the fear. It can work.