Foundation or Load Bearing Wall Issue?
Realistically, you are asking for opinions on a potentially complex subject. The only way to determine if the foundation settled is to perform an accurate survey, to tolerances of better than 1/8 inch, around the entire foundation and inside the house. The same survey would address the beam, specifically is the beam level, are the supports plumb, etc. This type of work is normally done by a professional engineer, and as it could potentially form the basis of litigation, it must be done carefully, professionally, and should be stamped, which means it won't be inexpensive.
No one on this board can possibly know what happened to your property without performing a detailed investigation, and any opinions offered should be treated with a great deal of skepticism. My recommendation is to hire a professional, draw up a written contract, and request a written, stamped opnion as to cause and origin of the apparent damage.