Severance and unemployment, do they overlap? - first time posting

My employer is paying severance in instalments and I am not sure whether to file now. It has been weighing on me all week. I have a mortgage and need to plan. Who should I ask before signing?

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

Some states only count certain kinds of severance. A local workforce centre could tell me which.