HELP!!!

I feel huge with baby number 2. I'm 20+4 and I'm up 15lbs 90% of it is in my belly. I only gained like 35lbs with my son. I'm freaking out, I don't know how to stop gaining weight. I don't snak and I don't eat bad. my boss just said to me this afternoon that she thinks I've gotten bigger since this morning. lol I'm going to be huge with this little lady. baby is right size but belly is measuring 3weeks ahead. any advice on how I can slow weight gain. I just turned 30 on the 20th so I'm convinced the age cursed me lol