I know from first hand how stress can affect.Many years ago whilst working for an Int temp controlled transport co in Holland i had a ‘burn out’’ if one can decribe the situation so.I was told go home and do nothing for 3 months.Now this was difficult,having an old fashioned mentality,‘‘i’m ok just need a couple of Days off’’.After i had almost blown up the house by putting pan on the gas,turning it on but not lighting it,then putting the coffee machine on but forgetting to put water in so it melted and burst into flames[thank god my wife was with me].Then i realised that i had a problem.