A night to forget!

Last night I woke up at 2:30 with the most agonizing pain in my upper back, ribcage and chest in general. I was actually in panic mode with how sore I felt, it was as if I had been punched super hard in the back and I could barely breathe. I took some zantac as it felt a bit like heartburn but 1000 times worse. When that didn't kick in fast enough I took a tylenol too, and I am VERY hesitant to take any pain killer or drug while pregnant. By 5:00 it had calmed enough to realize it was indeed heartburn and had been by far the worst heartburn I've had in my entire life, and I had acid reflux while growing up! This was absolutely terrible pain. I was contemplating going to the ER it hurt so badly. I am hoping like crazy that this is a one-time deal, but I didn't really eat anything that would off-set such a vicious attack of heartburn! I'm almost at 28 weeks and thats when they say heartburn will kick in...if it's going to be a real problem anyway. If it was this bad now, what will it look like in a couple months?! Scared.