What am I going to do with these chapters?

I had everything mapped out; fifteen chapters period. The problem is my first chapter was 3 pages and my 12th was close to 60. So I combined chapters 1 and 2 and cut chapter 13 in half. But I have a bad feeling I'm going to have to go back and do some more chapter breaks. I mean, who wants to be stuck reading a hundred page chapter, hoping for a break to stop for the night. Ugh! The story's almost written, yet there is so much more to do.