File for divorce. Not only will your wife, if she was the main breadwinner (as appears to be the case from your question) most likely have to pay you spousal support (alimony) and child support (if you gain custody of your child, as also sounds likely)--and you will be entitled to a share of the joint or marital property--but while the divorce is going on, you can get a court order on an "emergent" (think: "urgent" or "emergency") basis ordering her to pay you support during the action, so as to maintain the current status quo until the divorce is fully resolved. A family law attorney will know how to do this; consult with one right away.