I'm wondering if the hrt is causing your reflux. I have Gerd anyway, but took hrt for 6 months and my reflux was so severe even my usual PPI blockers could not stop it. This is not uncommon, other women on the forum have mentioned it.
I came off hrt a fortnight ago and it's all slowly calming down. Maybe some acid-blocking medication (PPI blockers) like Omeprazole or Lansoprazole could stop your reflux and heartburn and make you more comfortable? Don't ignore acid reflux until food gets stuck in your oesophagus like I did!