Eeesh! I know this feeling all too well. I used to be physically I'll over it.
Sometimes I have multiple conversations with my HP about turning this problem over, sometimes I recite the 3 Cs over and over. Calling a good friend to discuss her life is always a good distraction, but I never really started to overcome my anxiety until I started to set myself up for no longer being dependent on him to cover the bills. Now I know that if he never comes home I will be just fine! Oh, I would be upset for sure, but I would be okay.
Such a sad sad disease.