College while Pregnant

Kelbie • -Loving my life as a farmers wife!-Remington's mommy!6/27/17
Ladies I need some advice. 
I'm currently going to college full time and I'm 24 weeks pregnant. I've been doing fine up until probably the last two weeks. My back and hips are constantly in so much pain. I am sitting in a chair all day and it's starting to really hurt. I'm not scheduled to start my leave until the first week of June but if I can't get this figured out I'll have to do it earlier. 
Have any of you gone through this? What are some tips and tricks to make it easier so I'm not in so much pain??