Hello and welcome!
Great adivice above! You will find helpful and supportive responses here...so post anytime, and encourage your husband to talk with us as well.:)
Sorry to hear of your husband's struggles. I am also curious to know if he's considering or working towards getting into therpay for treatment? This is highly recommended for long term anxiety relief and management.
For now, here is the link to our Resources, filled with great self-help coping techniques. Check out the help for panic attacks and manging stress and its physical symptoms. Encourage him to practice the exercises everyday...doing so should yield some good results.
https://www.healingwell.com/community/default.aspx?f=9&m=104206
Wishing you both the best!
Scaredy Cat