those last 14 pounds

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ive done really well so far over the past year i lost nearly 100 pounds i now weight 12 stone but to be a good bmi i need to be 11 stone for my 5ft 7 inche frame temptations are everywhere and yes im a big snacker but i exercise so much everyday but im still at 12 stone i wanna loose the weight by the 1st of may with is my birthday any help and tips ?