I have a 4 hour exam (the GRE) to take at a test center when I will be 38 weeks pregnant and there is only one 10 minute break allowed. They are really strict about not letting you bring anything in (pillows, food, drinks, etc) and I just know I’m going to be SO uncomfortable. I’m wondering if I could use a back patch, like the icy hot one (but that specific one has a warning not to use during pregnancy) anything you guys can recommend to help me be more comfortable?