Is heartburn this severe normal during pregnancy?

i cant eat or drink anything without it coming on, it feels like my chest is expanding to where my bra feels 3 sizes to small and tums only helps for 5 minutes or so. i have to sleep siting up because the last time i layed down to sleep i woke up projectile vomiting bile (sorry for that TMI) i haven't layed down to sleep in 3 days and im so scared to even drink water. is this normal? can my doctor proscribe something for this? thank you