it does sound like LPR to me. I have similar symptoms with the coughing and tickling in my throat which makes me cough which makes it tickle more, and on and on. i also have the mucous, and post nasal stuff. I've had the heart palps and am a couple years older than you so do think it's hormone related myself; I started having this about a year or two ago, and looking back I now know it's LPR, reflux, but for the longest, I thought it was my heart, anxiety, menopause, etc.
I don't often cough once I'm asleep but sometimes if I wake up and then lay down again, I'll have a coughing fit. Very annoying
I try to stay away from too much chocolate, but caffeine doesn't bother me so do have my coffee every morning. It's trial and error. some days things bother and other days they don't.
there's a lot of people who get relief from a PPI -maybe you will be one of them.
I've found some things that work for me, but it's been a few months trial and error..
hope you find relief soon.