Weight Loss While Pregnant!?

Robin
So I'm already Overweight and was told by my Doctor that I can't gain more than 10-15 lbs. But I am a bit worried. I'm 11 weeks and keep going up and down between 180.6-182.9. This morning I lost weight compared to last week. Anyone else having weight loss issues. Im eating pretty much the same (if not a bit more junk food) so I'm hoping it's somewhat normal.