You girls are giving me a really bad conscience. I am almost 34 weeks and still in my normal bras. I did have to go up a size, but they are actually still really comfortable. I bought 2 maternity bras (another size bigger so that they'll fit when breastfeeding), but wasn't planning on wearing them until bub is here.
I don't know if that has anything to do with it, but I always make sure that the bras are not too tight around my chest, so maybe that's why they're still comfy.