i'm not a fat mama(only 23-24lb added), i always flown up through the whole pregnant period, more or less 38-39 weeks. i eat normally, anything if i want to eat, i will eat....but sleep much more than others....coz i always flown up (when i wake up, walk from here to anywhere)....it's really a hard time for me at that time. hopefully, my son is 7.5lb.
don't be worry about your weight, healthy is the most important, relax, keep happy, check up & prepare everything to hospital. sleep well, no stress.