Offer arrived, can I still ask for more? after 5 years as a pharmacy technician

I want to negotiate but I am afraid they will withdraw. I am in Fresno, in case local advice matters. I have a competing interview next week. What wording worked?

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

Ask about the range, not a number on its own. It felt more collaborative.