I probably can't help anyway, but I note I have no idea of what you mean by "..my heart when up to 160 over 80 non stop for two hours ". Perhaps a clearer explanation may help.
I will suggest that "a night of party" could be the cause, depending too on what that means.
The sensitivity of the back of your neck doesn't sound like anything I've ever felt or read about here.
Well, at least you know some are reading your post and the lack of response is likely for the reasons I've listed above.
Hope all is well, somethings symptoms just pass and we go back to normal never knowing what was wrong.