Severance and unemployment, do they overlap?

I was offered severance of 18 weeks after being let go as a pharmacy technician and I am unsure how it affects benefits. I have read a lot of threads here and could not find my exact situation. I have a mortgage and need to plan. How did your state treat it?

Before signing, I asked a friend who is a lawyer to look at the agreement. It was a short conversation and worth it.

Rules differ by state. I called the claims line and asked directly, then wrote down the answer and the date.