Weight gain in pregnancy

Danielle • Dated my husband since December 2006 and we were married May 2016. Baby boy Henry born June 2nd 2017 👶🏼💙
I was just curious how much weight you first time moms had gained in pregnancy? I am almost 20 weeks and have only gained 5-6 lbs so far but I am showing quite a bit. My OB retired so I won't meet my new doctor for a few weeks so I just wanted to ask. Thank you 🙂