SO tired... 31 weeks

I have been really tired lately...I have definitely felt a huge change in my body from these past few weeks from before. I can't seem to get comfortable in bed....I can't wear lots of clothes to bed because it's hard to roll on my side and get up to pee 24/7 at night. I find myself trapped by the 4 pillows I place strategically around my body. The only way my back will stopped hurting is if I am sitting straight up....which ISNT cozy!!! Aggghhhh I know it's only gonna get worse too!!! Nooooo