Feeling slightly overwhelmed, but in a good way

I have heard back from one of the grad schools I'm looking into, and I have a really good feeling about things. The application itself is due by June 1, which doesn't look like a problem. Transcripts, three letters of recommendation and GRE scores are due by July 15. The transcripts and three letters of recommendation shouldn't be a problem, either, (I have my three people in mind, it's just contacting them to see if they'll write a letter for me), but as for the GRE scores... Somehow, I think that's where I'm stuck. I'm not sure I can get everything lined up as far as accomodations and such by July 15. I'm still figuring out how to go about doing that and what all goes into it, anyway as it is. I would also want to get accessible prep materials in enough time to prepare. I'm fine with the fast-paced prep and taking of the exam in such a short time, it's just the other end that I'm worried about. Worse comes to worse, I could just hold off and apply for the Spring semester, thus giving me more time to take the GRE. I'll be calling the professor I contacted here in a little while, and so will bring these concerns to the table upon speaking with him. While this does seem crazy right now, it's a good crazy, and doesn't seem like anything I can't handle. True, this might seem like a very sudden decision, but it really isn't - I've been toying with it for some time now - but it's just come to cement itself in the past few days or so. That might not even make sense, I don't know. I really do think it's where I'm suppose to be. More as it happens.

An update

I just got off the phone with the professor at Northern Illinois, and our conversation was a very good one. I really think that I've found something good here. I'm going to make this happen! Off to be productive...