You brought up several symptoms that I also have. Headaches in am (sometimes migraine) occassional nausea and vomiting in am. (nausea also when driving) I also get this electrical feeling in my head when moving it around as well as heat intolerance. On Tues. after an lsb, my bp dropped to 84/50. So it could also be a bp issue causing all this.
I know my vision is not as good. (esp. my right) I have an eye apt. the 23rd, sleep study the 2nd and already had my labs done.