A little nervous

Dr says my glucosamine level was high by 22 points from the normal, she wants me to go for the 3hour one I already scheduled it for Monday, my mom had it for all four of us she said I just need to take care of ourselves, but I'm just a little worry since I've cut out most of the sweets which is what I crave(and moderate what I eat I'm scared to over eat and starve myself), and I feel down in the dumps. This is my second day... And I'm 11weeks tomorrow!