I would talk to the doctor. Maybe you can get in tomorrow. If it gets worse and you think it could be a heart attack, then head for the hospital.
Many have costo and TMJ. That could be causing some of this, too. I'm not a doctor and am guessing. Have your hubby gently massage your neck and your scalp. See if that helps any. If it does, that could ease your mind. I know when I get a massage, she massages my neck, the back of my head and a little across my forehead. It does help. With shoulder and neck pain, I think we tend to tighten those muscles more because of the pain. I find I scrunch my shoulders sometimes too.
I hope you start to feel better.
Sherrine