Losing weight, not seeing results.

Hee guys, I'm a 17 year old girl (5 8.5") and I went from roughly 157 to 137 pounds in the last 5 months, which is 20 pounds of some sort of "air" which I've lost. :O I see a minor result, but no-one else noticed it or asked if I dropped weight. Its like I've dropped 2 instead of 20. What the hell can be wrong with my body?!
Losing weight, not seeing results.
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