About "Out of Sight..."

I just wanted to write a medium lenght story about the redemption of Trixie, you know? Something not so long, yet not so short about this cyan unicorn magician who just wanted to show she was not a nobod-...ehm...nopony.

Instead, I'm adding chapters after chapters after chapters of context.
When I first started to write this story, I though 'Boy, I wonder if I'll be able to reach at least 10 chapters before ending the story.'
Now, with each new idea I have, I come up with at least 2-3 chapters of materials.

If you consider it takes me 1 month (minimum) to write a chapter and have it edited and that I was heavily slowed down by my academic commitments these past 4 months, if I have to write how Trixie will be forgiven by the other 3 of the mane6 and fix Twilight back or if she will miserably fail in the process, at my actual rate it will take me 10 more years and at least other 20-30 chapters to do so. >.<

On a related note, I'm working on both Chapter 11 and 12 of the story at the same time (since they're related), so, if I'm taking so much to publish the new chapter, is because I want to have both chapters to perfectly fit with one another instead of just publishing Chapter 11 and then mess something up in Chapter 12.