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

It is the first offer in 3 months and I do not want to mess it up. 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.

If they say no, consider asking for something else, such as a review in six months.