Heartburn 😩😩😩😩😩

I have had heart burn on and off throughout my pregnancy not much at all but tonight its so bad and it hurts so bad it literally will not go away. Please pray for me I have nothing to relieve it with... I've just been trying to drink milk. 😭😭😭 I sure hope it goes away and never comes back. But after tonight I'm going straight out to by stuff for heart burn so what am I allowed to take for it while pregnant??