SEVERE HEARTBURN

Sooo yesterday I got another case of heartburn.. Horrible burning heartburn. I've tried everything from liquid antacid, tums, milk, even my prescription from my midwife & NOTHING. It's made me throw up BLOOD this morning :( Needles to say I'm feeling the pregnancy wrath at the moment. Plus I feel like I got heat sick or something yesterday. Im 34&2 weeks.. Anyone have advice? Believe me I've tried everything but open to ideas lol.