Losing weight/ maintaining weight this late in pregnancy

I’ve gained a total of 22 lbs so far and I’m only 29 weeks. I’m afraid of gaining too much weight. My first pregnancy I only gained 20 lbs total. I am small but this pregnancy has paid a toll on my self esteem. I guess I’m not really concerned about losing weight as much as I am about keeping any more weight from piling on. Has anyone changed their diets and started exercising more in the last bit of their pregnancy? I weighed 110 pre-pregnancy if that helps with any advice.