Severance offer, what should I ask for?, medical assistant here

I was offered 4 weeks of severance after 4 years as a medical assistant, and I have a few days to sign. I do not want to leave money on the table. Did anyone negotiate and succeed?

An hour with an employment lawyer cost me a small fee and made me feel much safer about signing.

Thanks for writing this out. I went through something close to it 3 months ago, and it got easier once I kept a simple log of every call and form.