I am feeling extremely achy though my neck, shoulder area. Even my arms feel like i did a hardcore upper body workout and feel sore but weak.  I am so exhausted, and weak.  I started feeling that way last night and all day today. Should I go to the emergency room??
no, the emergency people will not entertain you. this type of problem usually occurs due to cervical spondylitis. your need to meet with a GP and get yourself an MRI. this shall confirm your diagnosis and then you could visit an pain specialist or a physiotherapist to get the rest of the treatment.