I'm on a really strict diet and today was my birthday...i exercise everyday and burn 800 calories at most and i've been on this diet for two weeks but it was my birthday so i ate a Haagen Dazs ice cream when my parents took me out for my b-day...will this make me gain more weight? I didn't eat anything else for the rest of the day except a soba noodle ( whole grain) and a fish. will this make me gain the weight i lost? so far i lost 8 pounds in two weeks. (i dieted and exercises my @ss off) HELP ME I'M REALLY REALLY WORRIED.

i ordered a small but it was hella good.