Have you tried the deep breathing exercises that I suggested above for your anxiety/panic attacks?

As far as your sleeping problems are concerned you could try progressive muscle relaxation. I use it as part of sleep hygiene (applying good habits in preparation for sleeping well).

The idea behind progressive muscle relaxation is to tense each set of muscles in your body in turn for a minute or so and then let them relax. I start with the muscles in my feet, then calves, thighs, buttocks, arms, hands, shoulders, etc.

In addition you could see a clinical psychologist who has experience of working with clients who have problems with anxiety or panic attacks. Learning CBT methods is often highly effective for such people.