Need help please

Madison

I’m currently 29 weeks pregnant and throughout this whole pregnancy I’ve only gained about 7 lbs. my ob told me I needed to gain more weight and to eat several small meals throughout the day instead of 3 big meals. I eat well, not sure why I’m not gaining. Any tips? Or really any other mommy’s that have dealt with this and what happened for the rest of their pregnancy and birth? We’re your babies ok? I’ve been reading and of course freaking myself out.