HI Dear PampP.
There is  law called the FMLA (Family Medical Leave Act), and with such a medical condition (work liability) your DH should easily be able to be off work for the 10 weeks allowed by law.  Sounds also to me like he is "Vagaling Down", what happens when the vagus nerve is compressed during coughing.  The problem lies in finding out why this happens and what his heart is like.  I wish you the best of luck and I have posted more than once this Holiday Season, Christmas is NOT about giving gifts and maybe as a whole, we should start realizing that.  You make something homemade for your loved ones, even if it is simple as homemade hot chocolate in a plastic baggie, wrapped in a cute square of cloth tied with a ribbon, a recipe and LOVE.   I have been unemployed for the first time in 20+ years for a whole year now and it has been rough.  I feel your pain, I really do, the struggle is so hard. I wish you speedy results to the tests and hope your DH gets better soon.  HenZ