Frequently Waking One Year Old

knottiebc0d7ff6775a4089

My one year old only sleeps about 6-7 hours at night and during that period wakes at least twice then is up for the day. He takes two naps or one longer one during the day for approx 2hrs in total. I am absolutely exhausted. He's been doing this for a couple of months now, slept beautifully from 5 months until about 10 months. I have no idea what I'm doing wrong, but I'm pregnant again and this lack of sleep is KILLING me in the first trimester and idk what I'll do if he continues this while I have a newborn. Any suggestions?