If you're losing 1.7lb a week on 1300, then you should lose 1lb/week on 1650 which is still a very respectable rate of weight loss. Why don't you give that a try and see how you feel?
I think you've gotten a lot of great advice, and I agree the most with the ones that said your body is used to lower intake...and when that happens you plateau.
Mainly what I wanted to say was CONGRATULATIONS!!! You're such an inspiration.
