Negotiating an offer, is it too late? (Denver)

It is the first offer in 5 months and I do not want to mess it up. It has been weighing on me all week. I have a competing interview next week. Did you negotiate?

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.