Hi Penpen,
If you are a stable weight right now, and not fluctuating up and down, then don't be worried about weight gain during pregnancy as long as you gain the recommended 25-35 pounds. This extra weight gain is normal and easily drops off after delivery.
Just be sure to plan a healthy pregnancy diet when you do get pregnant, and keep a pregnancy diet plan as well.
You should be fine.
Good luck...
http://www.signs-of-pregnancy-week-by-week.com/weight-gain-during-pregnancy.html