Yes, you do need to keep on them. Did you submit to them a written request of any kind for an IEP evaluation? If not, make sure you write down your request--an email will do--and get it to them ASAP. They will then be required to respond to your request by a certain deadline (within about a month).

Does the evaluation report include some recommendations from the evaluator on what accommodations the child might need in school? If not, you might ask the evaluator if they have some. That's probably a good list to start with.

One thing to keep in mind is that you do not have to accept what the school recommends as the final answer. They don't have to agree to your ideas either, of course. If the evaluator does IEP meetings and you think they'd be helpful, you can have them attend the meeting with you at your discretion. Even when the IEP team is the best in the world, it can be really intimidating when you meet with them because there may be 5 or 6 people on the school's part of the team and they will all think they know exactly what they're doing, whereas it'll be your first time to the party.

What state are you in? Do you know if your district has a gifted programs office?