Thanks for info ...
Well HCT/ Lisinopril , Vitamin D could not be the reason of insomnia .
Yes coffee stimulates nerves , so you should take it out completely in your daily routine , and coffee also triggers anxiety .
It seems that cause of insomnia in your case is underlying anxiety and respected customer keep in mind that anxiety medicine do not act very quickly almost after starting it takes three weeks , to start action .
So first thing that I would like to add be well adherent with pills prescribed by your dr , and while on pills keep in mind that they will effect slowly .
Second I will suggest you to have your thyroid function test .
Third , with anti-anxiety pills you should add short acting pills from Benzodiazepines like Bromazepam for sleep induction , so these will help you in short term while other pills for long term .
GERD has great association with anxiety , so this could be the manifestation of anxiety .
Get treatment along with test and proceed as I advised you .
Regards ***** ***** luck .
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