my ex husband's will is from GA, his children live here in FL. I need to contest the Last will and testament .

My ex husband died on 11/19/15. A month later his wife told us there was a will in which my 2 children he had with me are disinherited. In the will he leaves everything to his wife, and they have a child together. My kids ages are 21 and 14. I believe there has been some fraud. The will was created in 2012 when both children were minors. There was no reason to disinherit them. The wife has had a history of bipolar behavior and even had announced she was filing for divorce just before his accident. The will was drafted at the law firm she worked at which is a Personal Injury firm. And the witnesses are her friends/coworkers. Can I get a FL attorney or do I need a GA attorney? And I need an attorney that will work on contingency. I have no money to fight this. The wife made sure I did not get any child support in the 8 months that he was in a coma. SHe has been deceitful. She was granted guardianship and she was supposed to pay his child support to me for 8 mo she did not. Also