There might be a lot of missing info. to speculate, buuut my instinct is on the same page as BD, that these behaviour changes might well be due to your absence. Your first house sitter may have received loud text noises and possibly this freaked out your dog and he hasn't gotten over it.
Now the washer/dryer is causing stress. Hmmmmm.
I might try desensitization.
Record the noises that freak the dog out. And play them back at a gradually increasing volume while the dog is doing something it loves. Just a thought.
Be curious to know what other members suggest.