Weight Loss

Okay, so like I just got done explaining, I had a doctor's appointment last Thursday.  I went and had to fill out more paperwork (why is there always new paperwork?) and then went back for my weight and blood pressure.  After taking my blood pressure, my doctor sat down and said "So, have you been trying to lose weight?"  Yeah, I didn't take that as a good sign.  Apparently, in 3 years I've lost 41 pounds (which I think is good) and 17 of that was just in the last year.  While this doesn't sound horrible, I guess because I wasn't really trying to and because it's more than 15 pounds, he is slightly concerned.  In fact, I was told that if I lose more than 5 more pounds that I need to go in for testing of my thyroid to make sure everything is working correctly.  And here I thought I was doing so well...