Just like the title suggests we have figured out the reason I can't breath, am vomiting, and have horrible heartburn. After a few minutes of searching we found the heartbeat right under my diaphragm on my right side. My lo has decided since the placenta is in the way of her exit path she is going to get far away from it. So, the doc has suggested me taking Zantac 150 at night along with Allegra D 24 hour to see if that helps any. No it will not really cure all the breathing problems, but if my seasonal allergies are controlled I might just be able to sleep at night without coughing. She also thinks the postnasal drip are why I am vomiting and having heartburn. FX'ed that this works because I don't think I could stand another night of coughing, shortness of breath, vomiting, and heartburn so bad you would think it was something worse.