Cardiac neck pain vs stiff neck pain?

What's the difference between brain(let's say a stroke or aneurysm), Cardiac(Angina,heart attack) neck pain compared to a normal stiff neck pain? Can cardiac neck pain be worse when you move your head or walking upstairs just makes the stiffness worse? Can it be some sort of stiffness or direct pain that just completely goes away with no stiffness whatsoever? Will there be additional symptoms to the neck pain while going upstairs? If a stiff neck does get worse with stairs,sleep or any kinds of activities,let's say the stiff neck on the left side. I just have this really bad stiff neck that sometimes gets worse with sleep and stairs. But i do have problematic symptoms like breathlessness on 6 floors of stairs. Like it starts to happen after three flights of stairs and its just hell after. I gasp from my mouth for air by the end. Today i noticed the left back of neck stiffness got more pain during stairs so i got worried. I was carrying plastic on my lef hand. POTS, bisoprolol 2.5 Daily