The only way you could gain that much weight - even while pregnant - is by consuming a lot of calories. Has your doctor said anything about this weight gain? 32 lbs in 2 months is not healthy for you or the baby. You should slow down your caloric intake. You don't need much more calories per day than you did before - only 300. It takes 3500 calories to make a pound.
The optimum weight gain during pregnancy is 20-30 lbs. You've already gained over that amount. Talk to your doctor about a healthy 'diet' (I hate saying that since you are pregnant) for you.