don't beat urself up about it too much. there are several things to keep in mind. for instance, if you work out all the time ...i'm sure u already know muscle weighs more than fat. another thing is sometimes people aren't meant to reach their goals due to the way they're body is. at 137 pounds, i'm sure you look terrific!!!! try not to think of it as weight lost but more inches lost and the fact that ur now in great shape!! MOST OF ALL...DONT GIVE UP
do the best you can and be happy with what you've accomplished.
ps i heard in hotter climates people tend to weigh more something about bodies swelling or something.
GOOD LUCK!!!!!