Omg I know why my weight has skyrocketed. It's all the pop I've been drinking lately

I gained 3.5 lbs from last week and i know why. It's all the dr.pepper ive been drinking. I'll have like 2 or 3 cans a day and that's like an extra 400 to 600 calories give or take. I now know why im 130 lbs now.