15 lbs! Say What?!

Ok, so maybe I don't know that much about the mechanics of weight loss,but I've been following my 1650 calorie diet pretty strictly & this is not some 1-2 lb weight loss a week going on here. In 20 days I've lost 15 lbs. It's exciting. It's awesome, but should I be concerned at the rate I'm dropping the pounds? Shouldn't it have slowed down a bit? Maybe it's because my stomach has started to work again. I have lost 6 inches in my waist. That's monumental given my constant state of bloating these last 2 years. I've been following the gastroparesis diet pretty strictly - low fiber, lots of liquids, etc - & digestion seems to be relatively back in business, although I would not yet call it normal. I don't know. I'm happy, but part of me fears that this is too good to be true or that I'm doing something wrong for it to be dropping so quickly. Any ideas?

I feel great right now, almost like I can wear real, non-stretchy pants again! That will be AMAZING!! I tried a bit of aerobic exercise this week, but my joints were not feeling it. Guess I'll have to lose a bit more weight for the pressure to not be overwhelming. I'm dying to go swimming. I tried to talk Aaron into it today, but he's got way to much homework to even consider it. Once his finals are over in a couple of weeks though, you can't keep me away from the water! In the meantime, I'm half-way through the Hunger Games trilogy this weekend. Reading it makes me feel a little stronger. I love being inspired by fiction. I love rereading my favorite books during different phases of my life & seeing how differently I interpret them. The question is: Harry Potter or Percy Jackson next?

Today I feel like this...
the more confused, more childish version of myself...

& yes, this is actually me as a child...