I'm seriously about to go over my tums limit 😩😩

Uhg, this heartburn is killing me!! I've had 5 tums today and it's only 2pm... going over isn't really a big deal for me because I barely have calcium in my diet right now (I know I should lol) but still. My heartburn has not been this bad since my first tri, I'm only 1 day away from my third tri (27 weeks). 😣😣 I just feel defeated, and Zantac only makes my heartburn worse too 😢 and I refuse to swallow apple cider vinegar just the thought of it makes me want to puke.