Best to call attorney or bank until you get a understanding of status. Why are you waiting so long to go back to get your belongings? This may be the biggest issue!
First Weber Group
Certifed Distressed Property Expert
Contact your bank or the number on thge sticker that should have been placed on your doors or window.
You may no longer be the owner of the home. If the foreclosure has occurred, then the bank owns the property. Or maybe even someone's bought it from the bank. You'd be trespassing, at the least. I don't know if personal possessions left behind convey with the property, but if they do, then you'd also be risking charges of theft or burglary.
Check with a lawyer. Or contact your lender and explain that you'd like to retrieve some personal property. But don't just break in there and take stuff.