Hi Audrey,
have you had your blood tested for Underactive Thyroid? This condition can make you gain weight rapidly despite exercise and healthy diet. I find that I cannot lose weight even on 900 calories a day and regular exercise, unless I exercise for aprox two to three hours a day, and even then would only be able to lose aprox one pound or half a pound a week. Before diagnosis I gained five a half stone in eighteen months. (There are fourteen pounds in a stone)!!!

I hope that there is not a medical problem causing your weight gain, but sometimes it is best to check if this is really abnormal for you.

Sarah-Jane