Offer arrived, can I still ask for more?

I received an offer as a school bus driver and I think the pay is a little low. It has been weighing on me all week. The hiring manager was friendly and open. Did you negotiate?

I thanked them and said I was excited but hoped we could talk about the pay. They came back with a bit more.

Keep everything in writing and save the confirmation numbers. It made the follow-up calls so much easier.