Back to not sleeping

I had a nice stretch where I was up a million times to pee, but able to fall back asleep and stay in bed until 5:30/6am. Now I’m back to being up for huge chunks of time!! It’s like my brain is happy with 4 hours of sleep? And then after being up for 3-4 hours I’ll fall back asleep for another 2-3 hours. This is killing me. I’m a teacher and can’t run on broken sleep 😭 I’ve also been up from burning rib pain. My doctor ordered an ultrasound for Monday to check my gallbladder, since the pain has only gotten worse since 28 weeks. I am ready for baby boy to come!!