Thanks for the replies.
Yolo - I also take Lamictal, I think 200 mg, and I started that maybe a year or year and a half ago, but I'm not sure that's contributed, since I can't find a specific side effect for that (or weight loss, just anorexia (appetite loss), and I didn't have that problem when I started). I did start Vyvanse (an ADD med) maybe a month or 2 after I wrote the original post, and that zapped my appetite, and I lost another 10lbs. I've stabilized since then, but my bra size went down to a 32C, although it can still be a little big depending on the bra.
I'm sure it's just weight loss, but it bothers me that I seem to be losing most of it in my chest. I've actually become really self conscious about it b/c I have no muscle mass and my breast are "saggy" b/c I lost so much tissue/fat and so it's stretched skin and the remaining tissue pulls it down. As a result, my chest looks very thin and you can practically see my ribs. But outside of my chest/upper body, I look normal - hips, butt, thighs
My bones aren't sticking out, I'm wearing average size pants, etc. Family members (who I see once a month or so) keep telling me I'm too skinny and I need to gain weight, but I'm not actively trying to lose weight, and I think most of them think I'm too skinny b/c of how thin my chest looks, and that's what you see the most of. (Also, I used to weight 50 lbs more than I do now, and I think they still aren't used to me being thin) (For the record, I'm 5'8" and 130lbs, my BMI is within the normal range, and as I said before, I'm NOT trying to lose weight anymore, and I haven't been for a long time. The Vyvanse definitely contributed to my most recent weight loss, but that's steadied out and I've been at the same weight for probably 3 months, at least)
I'd like to gain muscle in my chest but I don't know how!
And Twohands - I'm 25, but my breasts look older. Seriously - stretch marks, saggy - definitely not perky (but in all honestly, they never were!) I have "fake boobs", but those are for wearing backless tops. I don't like the idea of "faking" it, and it doesn't help with the issue at hand.
I'd like to state that I don't necessarily feel defined by my breasts, or that I feel less feminine, per say. While I don't like having a smaller chest (compared to how I was), I'm more upset about the physical appearance of them, and how different my chest (as a whole) looks. I don't like feeling self conscious about wearing lower cut tops b/c my chest is so thin and it looks like I'm too skinny. I used to be comfortable being topless, but now I want to cover up b/c of how different I look. I even feel self conscious around my husband! I'm sure there's not much I can do to get them back, outside of putting on weight and hoping it goes there instead of my lower half, or getting surgery. So I just want to stop it, or figure out ways to build up my chest wall a little to counteract the thinness that's resulted from the loss.
Again, thanks so much for the responses - I appreciate them!
Any other tips or ideas or... anything, is always appreciated!