10 lbs!!! Wtf!

Hi i am 5foot 4inches and pre pregnancy i weighed 210. Today i went to my ob appt and she said i "could" only gain 10lbs total durring my whole pregnancy.... 😭😭😭😭😭 im not freaking out because i want tk gain weight but its hard im already weighing in at 216! I havent changed my eating, i eat pretty well fruits and veggies offten no soda or juice only water, idk what to do work out alot! I go for 1.5 mile walks 5days a week. And feel like it needs to be 2.5 miles for me to make a difference! Sigh anyone else having a similar problem? Thanks ladies!!!