Nauseating heartburn even with my meds

The past couple of days, I’ve had the WORST heartburn. Like, make me wanna stick my finger down my throat and puke bad. I do have acid reflux… so I’m on Prilosec for it. I’m also on Pepcid at night. I’ve been taking it, but holy cheezus I’m suffering right now. I can’t drink milk (makes it worse) Idk why I’m having it so bad. I do occasionally try mustard when I get it like this, but even that’s not helping. (Usually it does 🤣) I just want it to go awayyyyyyy… I know I can take tums and stuff, I just don’t wanna put TOO much anti acid in my body… what else can I do??