I'm only 15 weeks, but the last couple of days have been a little rough. I feel like my heart is racing, and feel like I'm on edge. I'm not especially stressed about anything, but feel just anxious and a little short of breath. Is this normal or something to be concerned about? I was at the Dr. two weeks ago and my blood pressure and heart rate were great and my weight has been pretty steady - I don't think I've gained but a pound over the last three weeks. We did spend most of the weekend cleaning but I didn't use any chemicals and didn't do any heavy lifting. Thoughts?