Is it Normal I Keep Gaining Weight 2 Weeks After Lipo?

I had lipo to my abdomen, and rear flanks. I was 260lbs, now I'm 271 two weeks later. I've been eating clean, drinking a lot of water and I've been doing low impact cardio. I'm still really swollen, its pretty uncomfortable at times. I feel like I'm getting chubby in other areas but dont know why. I know that fat would go to other places I have had some diet sodas, and had some fried cheese in the past two weeks. I'm in the military and I'm just not use to working out and gaining weight.