What is considered rapid weight gain...i have gained 12 lbs since 7/1/15 .

12 pounds in 8 weeks: Rapidness is in the eye of the beholder, but 12 pounds in 8 weeks does sound rapid... unless a person is pregnant and growing large. Otherwise, if one doesn't have a good reason for the weight gain (such as eating extra food every day, such as 2 extra Häagen-Dazs ice cream bars a day), one can see her primary care doctor to find out why her weight is rising.