Past the point of desperation...

I have reached my limit of how much more I can take with dealing with this heartburn. I've tried everything. I've been taking the max amount of Zantac I can take in a day and it has started wearing off hours before I can take another. I've tried other pregnancy safe anti acids but Zantac was the one that has worked the best for me. (Until about two weeks ago). I am also dealing with Asthma and I feel like this sever heartburn just makes it 100 times worse. My inhaler is not helping and I have had a constant wheeze/ bad cough since this sever heartburn has gotten worse. I know heartburn is very common but I'm not sure how to manage it anymore. I only get a few hours sleep each night due to sever heartburn and constant mucus coughing/ feeling like I'm suffocating. I sleep propped up, I avoid spicy/ greasy foods/ chocolate/ caffeine/ I'm eating smaller meals/ don't eat hours before bedtime... It's been so bad the past few days that i carry around ice water to try to try and push the burning down, I get chest pains like a fire is trying to burn out of my back.. I don't know what to do anymore. I have an appointment tomorrow and I plan on talking to my dr about it but I'm not sure what they can do for me...