Heartburn..HELP!!

Does anyone have any quick, safe remedies for heartburn? I woke up at 4:30 this morning with the worst heartburn ever. I had to prop myself up on a bunch of pillows and basically sit up in bed because I couldn't even lay down without hurting. I felt nauseous and like I had something sitting in the back of my throat :( while I have felt some better throughout the day I still have the same symptoms. I have taken tums twice with very little relief. I know this is a part of pregnancy, especially as I get further along but I need some relief! I am open to any and all suggestions! Please and thank you!