I'm having stiff neck pains on the left side and it moves to my back, hurts more through the night and when i'm sitting working on the computer?

Lavator syndrome: If the pain is between the spine and your shoulder blade, i would consider levator syndrome (muscle irritation) likely due to posture especially computer work. Rest, ice, nsaid's, and salonpas hot patches (capsacian patches) are good. Change your posture, monitor at eye level. Consider mckenzie pt (robin mckenzie, treat your own neck, available online $8.32).