I attempted to enter Mexico earlier today and was told to leave.
I had been on probation for 10 years staring in 1999 and ending in 2009.
What do I need to do to enter Mexico. My fiancé and her family are still in mexico.
I am due to get married on Saturday.

Can anyone help me with this?

You must apply for a visa... contact Mexican consulate.

It is doubtful it will be approved, and most ceratainly not in a week. But yes apply for visa.