When I walked into my doctor's office for the first time, I weighed 100 lbs, and I looked like like a little girl, apparently. The doctor said, "Now, I don't want you to go splurging. Just cause you're pregnant doesn't mean you have the freedom to gain 50lbs...I know how you teenagers are!" Someone hadn't told her I was 20 years old, common-married for three years, and owned my own business..lol.
I gained 88 lbs, and my body did not start returning to its normal state until I stopped breastfeeding ten months after my daughter was born.
I did eat whatever I wanted whenver I wanted- a quart of ben and jerry's ice cream once a day, a half gallon of chocolate soy milk at a time, salads with shrimp and artichokes smothered in creamy dressings, lots of chocolate and LOTS of cheerios for my nausea...
What I'm saying is that your body has its own idea of what's going on, and you have enough on your proverbial plate to be stressed over weight gain. When you're holding that healthy baby, you are not going to thinking about the pounds that came with her/him.
One piece of advice about handling the heaviness that you're about to be carrying around- Walk it Off. When you feel uneasy- especially when that kid gets up under your ribcage (oof!)- take a walk. It will increase your oxygen all over, make you feel calmer, and increase your endurance for the big day: ) Also, when anyone bugs you about having too much weight, you will know that if it wasn't coming off with moderate exercise, it wasn't SUPPOSED to: )
congratulations and good luck!!