Bigger weight loss than expected?

So I've basically had it in my head that I wasn't expecting any weight loss in the first week, that I'd just deal with any side effects and wait for the medication to get into my system. I did have an upset stomach 4/7 days but I still drank more than usual, tried my best to eat protein rich meals around not wanting to trigger my stomach. Weighed myself today, 2 days after my second injection, and I've lost 10 lbs 🙃

I wasn't expecting it, and am not expecting it going forward. Just wondering if anyone else experienced this and can share what their journey was like going forward so I might have an idea. Like if it stalled, if it was just water weight and I can expect closer to what I had in my mind, etc