This is driving me crazy.

There is a strong odor, like a rotten egg, in our home. This odor seems to move around and is getting stronger. We started to notice this odor on Sunday.

We have looked under furniture, smelled the heating/cooling registers, fridge, looked in the basement and outside...nothing and no rotten egg ordor coming from those areas.

We are on well water and septic. We had our septic system pumped out a couple of weeks ago.

I am out of ideas as to what is causing this odor.

Anyone have any ideas?