Dear friend,
Happy that you are trying hard to hold the marriage. His panic attacks might be due to many possibilities. Unless we sit and talk to him, it is difficult to make any conclusions. When you visit next or when he comes here, visit a psychotherapist and get help. Before going for your counseling sessions don't try any medication.
Any assistance required feel free to contact me
Next Steps
Get help from a psychotherapist
Health Tips
Make little lifestyle changes to have a positive approach to life.