It sounds like CH ,regardless , but I still wound't be 100% sure.
If you get it always in the morning maybe it has to do with something else that is happening in your sleep right after you wake up.
You should get O2 as soon as you can , even welding O2 will do.
For me it works really quick,
be sure to read a guide of proper use otherwise it will not work at all. I learnt this the hard way.
What is your normal blood pressure and when you get CH?
E-drinks-----For me anything really helps,,,but always cold,,,sugar,no sugar, red bull,monster ,cheap walmart brand, it'll all the same. And always at the very first sign ,I drink it really quick , then O2