have you tried tums for heartburn? I found they were the nicest tablet to take for heartburn, you can find them in your supermarket and they are suitable for ladies who have passed their 2nd trimester. Im sure you have a multitude of pillows at night, but i find two under my head (good for the heartburn), one supporting me under my tummy, one between my knees and one to cuddle often does the trick..(even if hubby can't get anywhere near me!!). hang in there though!!you can do it!!.
I also know that fruit tingles can also taste yummy and be great for heartburn...mmmmm fruit tingles....mmmm