I can not stop and heal I am

I can not stop and heal I am the bread winner and have 5 kids and a part time business that will only function if I am there and working. At first when it came to light I was unable to get much done I work piece work and if I did not suck it up we would be in a real money problem. I try to act normal and do an ok job of it but I am not the same I am not as patient as I use to be I get frustrated much more than I ever use to. I know I am running myself into the ground but do not see any other choice. I have not had a vacation in almost 4 years I work or should I say spend 50 to 80 hours a week working or driving to and from work. I did not my wife to have to work so she could be home with the kids and she is the one to go and have an affair and I seem to be the one to have to clean this up and protect her for the kids sake. So I do not have the time to heal.