Hi there ~
One thing is clear from your history that you are not able to sleep well. It is a condition called insomnia
and it is in your case secondary to the issue that you describe about having headache, feeling dizzy and tired after talking. Treating insomnia usually makes your dark circles
and issues with tiredness
and panic attacks better. I would then go about treating your other issues including GERD
to help with the medical conditions.
However consulting a doctor to describe your history and have a physical examination done, running some blood tests and maybe some imaging studies, wil put your worries at rest. I hope this helps.
Take care and have a lovely day!