We just bought our house and the home inspector passed the house, but as soon as we moved in, the dishwasher and the washing machine started to back up into the shower. At first it would drain out very slowly but now it won't drain at all. I've used declogging chemicals but they don't seem to work. Our house is a one story home with one bathroom. I'm at a loss as to what to do. PLEASE HELP ME!

You have a blockage downstream from your bathroom. The solution is to snake out the lavatory roof vent. Put out enough cable to reach the base and 20 feet more. Test by cycling the washer. This problem couldn't have been picked up by the inspector unless it backed up when he was there. Regards, Tom