24 weeks today (Tuesday) & I have an appointment later on, I'm pretty sure I'll be doing my glucose testing although I was never told last appointment. But if I am is there certain things I need to do or avoid before taking. ( I've heard of ppl having to wait even longer while at their appointment because they drank/ate something they wasn't supposed too, or pees before. I feel like I should have been informed. I just wish I knew a 100% what this appointment consisted of