Too Much Weight Too Fast

So, I'm thinking that I may be hitting the "water loss" stage of the overall weight loss experience.  Normally the water loss stage, where your body purges itself of excess water, occurs early on in the overall weight loss program.  I'm not sure that I experienced that weight loss back in August.  When I started to lose weight I started losing weight at almost the precise number expected from my calorie deficit.

Then I plateaued which I explained as being a defective weigh scale due to batteries.

Then I plummeted in terms of weight loss.  As of this writing it has been over 11 pounds in 8 days.

11 pounds.

To be honest I am almost scared of the wight loss.  I'm almost thinking that it is too fast, but what is causing it?  I am still drinking 8+ cups of water a day.  I am walking over 8000 steps a day.  I am eating a 2000 calorie a day diet (up in the past few weeks to be honest).

I know that a number of people are kind of peeved with me right now in that they would love 11 pounds in 8 days, but I'm trying to make sure that I am not screwing up my metabolism.  I'm trying to make sure that my weight loss is stable, repeatable and foremost, safe.

Let's see if this continues.