My ex-wife and I are divorced and she will not let me obtain my own personal belongings out of our marital home

You can probably file a motion with the divorce court where your divorce was finalized and obtain an order requiring your ex to give you your things within a reasonable time prior to the foreclosure. However, each state has differeing "wait" times to get to court - some places you can get your motion heard within a matter of a few days, and some courts are so busy it can take a month or more- so check your local time limits and get your motion on file early. Most courts have a self help center where they will assist you. Many counties also have a referral service that will give you a one hour consultation with an attorney for a minimal charge. It is probably worthwhile to look into it with your local family law court clerk to see what is available.

Good luck.