Heartburn help!!!

Shannon
I've had mild to moderate heartburn second trimester onward but in the last week it's gotten so much worse! It feels like my upper stomach and esophagus are contracting or something and it's just downright painful! If that doesn't make sense, picture that feeling of having a large piece of tortilla chip stuck in your throat but all over. 
Anyway I've started to eat smaller meals, trying to not drink anything while eating, a glass of milk to calm the acid, and of course tums but nothing seems to really help so far.
I am open to any and all suggestions at this point!