Clear liquid Stall?

I am 4 days from Surgery!Yippee! But I have a question about the clear liquids. I lost 12-13 pounds the first 7 days and then am just stuck there teetering. I am totally following the clear liquids. I usually have broth and jello as breakfast, then a shake for lunch, a shake for dinner, and jello again for a late snack. I might have a sugar free popsicle. I am doing about 44 oz water and then about 44 oz of water with a sugar free sweetner( crystal light.) Plus all my vitamins. Is my body just in starvation mode or could it be all the sugare free crap. Tell me what to do! Im not too stressed because I had already lost 30 lbs so another 12-13 is good but thought it would be more before surgery. And does this mean that I might be a slow loser after surgery if my body is in starvation mode? Thanks for any advice. Really just happy to be on my way!