I m 36 weeks pregnant with our 5th child. I remember getting short of breath around this time, but yesterday I also was getting some constant mild-mod. pain between my breasts--especially if I take a deep breath. The baby is riding very high, right under my rib cage and kicks constantly. It probably doesn t help that I m only 5 2 , so all my organs are very squashed right now. About 6 weeks ago, I started getting mild tachycardia (resting heart rate around 98-104 and occasionally going up to 116-120 at most). The dr. had done an ultrasound on my leg veins to check for clots and nothing was found. A CT scan was supposed to take place, but the machine failed to work. I was hesitant about the safety of the CT on the baby, so when the ultrasound showed nothing, the DR. decided since I didn t have any other symptoms, we could wait. So now, I have this chest pain. Is this serious or is this just a late pregnancy, bothersome thing to put up with for a couple of weeks? I should also add that I feel constipated (have been taking stool softeners) and feel like if I could burp, maybe I d feel better. I took Gas-X five hours ago with no change.