G'day Giovanni, and welcome to CS .
Ah sorry to hear that mate. Not sure I can help exactly, but recently I had incredibly horrible acid reflux, and I just lowered coffee intake a little.
I'm not too sure acid levels would be too different between different coffees (but acidity is, being moreso a taste descriptor as opposed to acid levels), I could be wrong. Am not sure if it's a caffeine thing.. if so switching to decaf possibly? Either that or just lowering coffee consumption throughout your day, halving the strength of each beverage possibly...
Keeping in mind I'm just throwing ideas out there, this is certainly not medical advice haha, so take it with a grain of salt. It may be a matter of trial and error and listening to what works with your body.
Best of luck bud!