Your situtation requires some legal research into the possiblity of setting aside your separation agreement based on the idea that you and your spouse reconcilled before you stopped living together. If the agreement is set aside then you may have a claim for alimony.
You need to hire a lawyer and have the document reviewed along with a complete review of the facts of your situation and the law.
Do not delay. You must deal with this issue prior to the divorce.
Lee S. Rosen
Board Certified Family Law Specialist
The Rosen Law Firm
4101 Lake Boone Trail, Suite 200
Raleigh, North Carolina 27607
The response posted above is based upon the limited factual information made available and is not intended as a full and complete response to the question. The only reliable manner to obtain complete and adequate legal advice is to consult with an attorney, fully explain your situation, and allow the attorney sufficient opportunity to research the applicable law and facts required to render an accurate opinion. The basic information provided above is intended as a public service but a full discussion with an attorney should be undertaken before taking any action.