Severance agreement arrived, need a second opinion after 5 years as a data-entry clerk

I was offered 5 weeks of severance after 5 years as a data-entry clerk, and I have a few days to sign. There are 5 people counting on me, so I am trying to be careful. I do not want to leave money on the table.

I asked for two more weeks and a neutral reference. They agreed to the reference and added a week.