How much room is there after an offer? after 6 years as a bank teller

I received an offer as a bank teller and I think the pay is a little low. I have read a lot of threads here and could not find my exact situation. I have a competing interview next week. Did it backfire?

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

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