I'm having a problem with my downstair toilets. They started to make bubble sounds and the water would disappear. My husband took a shower and the toilet backed up into it.

The upstairs toilet is fine. It started when I was washing the clothes and my laundry room is upstairs. Don't know what to do. When I flush them they fill up and later will go down but not come back up.

You have a partial blockage in the drain lines and they must be snaked out. As a rule this is done from a roof vent. On a two story house this is a job for a experienced plumber, especially in the winter time. Good luck, Tom