Usually, with a 2nd pregnancy, a Doc will have specific amounts of weight gain.
For example: with my 1st pregnancy, I gained 25 pounds. I never lost that weight really.
With my 2nd pregnancy, and per my starting weight with THAT pregnancy... my Doctor allowed me to gain only 15 pounds total, for the entire pregnancy. I actually gained only 15 pounds then. BUT I did not have to try nor diet nor hinder my eating in any way. For some reason, I only gained 15 pounds with that pregnancy. But my son was a fully big healthy baby upon birth! Over 8 pounds.
My Doctor, though, is strict....
I am also a short woman... like you. But weigh less.
Your Doctor, should be, gauging your weight and/or any concerns about it.
Per your cravings... what are you craving? Maybe just reduce the amount you eat... and opt for a healthier version of it. So say if you crave ice-cream... maybe opt for low-fat yogurt, instead.
Watch what you eat... but eat healthy....
My Doc as I said was strict.... and he forbid juice even, for example, Because it is just sugar...
all the best,
Susan