Fears of losing my company

I recently had to have some tumors removed near my brain and had to take an extended amount of time off from work. Currently we can't even pay the bills because of my missing income. I have yet to say any of this out loud and I felt like this is a safe place to let it out.
  1. What if my clients don't come back
  2. What if I cannot find new clients
  3. What if we lose our cars due to my loss of income
  4. What if the doctor can't clear me to work soon
  5. What am I going to do?