I have had this horrible pain in my chest like right between my boobs and also in my back like straight through .. in between my shoulder blades. I dont know what it could be but I have had it for two hours now and took tums and drank milk and tried laying on my back, tried sitting up, tried walking around.. nothing is working. Has this happened to anyone else? What could it be? How can I make it go away???? I was in so much pain earlier I was in tears.. I am 36 weeks pregnant.