gaining not loosing

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I am gaining weight and my cloths size went up and I know it is due to too many calories even with all the exercise. I need to stick with a plan and am considering going to one of those weight loss clinics because I can't seem to stick to anything. I used too, but my professional job stresses me to know end and I have 3 kids I come home too, my husband is never home with long hours and my weakness is cooking at dinner time I seem to just give in to temptation. I have tried a lot of things so I am planning to quit my job just to decrease the stress in my life. Any suggestions???