I experienced the same. Mine was due to being in the habit of eating about 3000 cals a day and training hard, during season so I had no weight gain then. Then I crashed in the late fall and broke my hip. Between the habit of eating so much and the mental change from going all out to all stop, I gained 20 lbs during the winter. I did take most of it off, but it was a struggle. Good luck in loosing weight again and getting back in shape. New goals new challanges always around every corner.