Acid reflux is so sad it’s making me nauseous

I’m almost 18 weeks along and this week my acid reflux has been absolutely destroying me. Doesn’t matter what I eat, if I sit up/lay down, acid reflux is 100% hitting me. By dinner time the last few days it’s gotten to the point where I feel nauseous and almost throw up. Eating isn’t pleasant because of all of this. I was less nauseous and eating more in my first trimester. And Tums have only been helping so much (I also don’t want to take them too much to the point where I’m overdoing it).

Anyone else? Or any advice? Help please :(