Need some advice on my house.

AJ/FormS said
That's NOT good and may be indicative of a physical problem. Dare I say , probably is? I see dollarbills, tugging on the bank-vault doors...........

I have to agree with lawnmower man. :D

Around here they would tell you to dig down at least 18 inches deep and wide and fill with concrete for the footers, as well as diagonal brace between the studs.