Is this a heart issue or anxiety?

I've been under a huge amount of stress at work lately.I've been having some issues and this has been going on for the last 3 weeks.I will have what can only be described as a feeling of a muscle spasm at the base of the front of my neck almost in my chest.It's not painful just annoying.I have become light headed,have had floaters in my eyes that obstruct my vision anywhere from a few seconds to 15 minutes.I feel short of breath when I am forced around a group of people.I don't have chest pains per say but I have pain around my left side of my chest in addition to muscle pain all over.I work 60 hours a week at a stressful job that demands allot of labor.I have had anxiety issues in my past and was wondering if these symptoms are just stress and anxiety panic attacks,or something more serious? I go back to my doctor in Feb. but am curious to get some opinions..thanks.!