Always tired

I'm 27 weeks pregnant & I'm always tired 😔 I can never sleep at night so I sleep a lot during the day & when my mom is home, she always bugs me & tries to wake me up! Then she wants me to come to the living room & watch tv with her since I'm always in my room, but there no couch, just 2 uncomfortable chair that I dislike sitting in . How do I get her to just leave me alone & let me sleep?!