Another idea is to find a photo of yourself when you were at your highest. Then, each month, take a new picture of yourself. Sometimes what you don't see in the mirror is strikingly obvious in pictures. If you still have the same clothes as when you started, it's fun to take progress pictures in them on a regular basis.

Also, you're losing at an amazing weight, even if you don't believe it. Sometimes the body has to slow down, assess, and be in stasis for a while.
You've averaged 12 pounds per month so far. That's freakin' AMAZING!

One last thing is that a lot of us found that after losing a good chunk of weight quickly (as you did), things will slow down for a couple months. When I originally did Protein Power many years ago, I lost pounds quickly for maybe 3 or 4 months, and then BAM! I hit a wall and couldn't lose any more. But, I stuck with it and in the next couple months I dropped a pants size even with no additional weight loss.

Don't start questioning things yet. You're doing GREAT!!!