What does muscle loss look like (females)?

electricmeow

I've lost 15 pounds but when I put pictures side by side, there isn't much difference between 150 and 134 pounds at 5'8". I notice in particular, my shoulders, collar bone, and chest area are reeally slim. I am down to an A cup again, but my overall structure seems smaller when I didn't have fat there to begin with. My face has lost some weight as well, but barely any inches loss in my legs and hips where I need it most.

What are the signs of muscle loss other than not looking like you've lost fat? Thanks!