Hey Jon, sorry to hear about the loss of your wife's father, as well as all the hard times you're going through. It might certainly be stress related. Stress does a bunch of nasty things to the body (and mind) eventually. I think what happens a lot is that people become so stressed with life, and then resort to eating bad foods. Either to cope, or out of ease. So, perhaps something to look into. Not trying to sound like I'm accusing you of eating bad stuff, though. : -) 

Certain medications can also cause acid reflux. 

Beyond that, stress isn't good for the body, but, stressing about being stressed is something you should try to avoid. Stressing about how stressed you are will only work against you. Hope this helps somewhat. I don't know much about acid reflux, but I just thought I'd chime in. 

Hope all is well. 

I’ll suggest a “fix” for the hiatal hernia: it’s a protrusion of the stomach moved above the hiatus.
Drink two large glasses of water (each about 16 oz. or 450g). Stand on your toes and slam your heels to the floor. The weight of the water in your stomach should push your stomach back into its proper place. 

it worked for me after suffering with it for a month.