some of the reuirements needed for your filipino fiancee is a Certificate of No Marriage(CENOMAR) from the Philippines NCSO.And authenticated(Red Ribbon) by the Department of Foreign Affairs in Manila and a Certificate of legal capacity from the Phil.Embassy Doha.

And for you is your divorce paper and Certificate of legal capacity from your embassy,

These papers are to be submitted at the officiating priest/minister.

With regards to your visas ,I have no idea.