I am currently 25 + 3 with baby number two. I just started showing, but I feel like I am as big as a house. I can't breathe, I have heartburn, I'm short of breath and just uncomfortable. I don't ever remember feeling like this with my first pregnancy...is there anything I can do to help alleviate my discomfort? I walk two miles a day! I also do some yoga stretches to stay "active".