Chills and shaking legs sounds like it might have been a stomach upset /virus and doesn't sound like GERD. So, that could have been a one time thing.
Are you cold at home/in your house, as compared to Florida which was warm? You might try to breathe, stretch, and don't slouch at home. Also chew your food well (maybe you rush more at home). Keep a written log of when you have heartburn or other symptoms, and see what could trigger it. Instead of a PPI better to try an H2 blocker first (Pepcid) or the reflux gourmet before bed. Also think about what happened before your problem started. I had a problem with my jaw that caused me not to chew properly (especially things like popcorn), and another time I had a surge after carrying something very heavy, and another time I had a surge after having lots of coughing from a respiratory virus. And each of these things caused me to have reflux for quite a while afterwards.
Good luck, I'm sure you'll figure it out.