Gaining too much weight!

Teresita • Super excited to have my second child. It's been tough... But I know I'll be happy once the baby is here.
I started at about 140 lbs pre-pregnancy.... And I've already gained 22 pounds and I'm only 18 1/2 weeks!! I've been staying pretty active but I'm always starving and thirsty. I am afraid to diet while pregnant and I'm not really sure what to do about gaining too much too fast. I'm starting to feel bad about myself because everyone's saying, "you better not eat too much or you'll have more to lose after pregnancy!" Or they say how small they were at 18 weeks and say how big I'm getting. I'm trying to eat healthier, but I feel really insecure gaining so much.