Reluctant to start next book

Based on a recommendation I read on here I have recently read book 1 and 2 in the Dark Days series. I read them really quickly and enjoyed them more than anything else I have read in a long while.
As soon as I finished book 2 I immediately brought the third book but it has been sitting unread on my Kindle for a few weeks now.
There are a few reasons why I am reluctant to read it:
- I am really busy at work at the moment so now is not the best time to start reading a book I can't put down. I found myself staying up far too late reading the first 2 books.
- This is the last book of the series, at the moment I have the anticipation of looking forward to it but once I have read it, it will be all over.
- The main reason is I am scared that it won't end the way I want it to. I was heart broken by the end of the second book and I don't see how the author can unravel the situation to give me the ending I want!

I know it's just a book and I am being a bit dramatic and I will read it soon, I just wondered if anyone else has felt this way about a book.

If you have read the third Dark Days book please don't post any spoilers or even any hints about what happens, I like the tension and knowing what happens would ruin it for me.