Definitely your symptoms tells me about u having neck pain which can radiate to your shoulder as well associated with dizziness.. In such case very important to maintain posture of your neck. Protuded head and rounded shoulders is the typical posture which computer users have and which leads to neck pain. Few modifications like raising the height of ur work table or using desktop at your level, using mobile phone at ur eye level and avoid looking down will be useful. Chin tucks should be done more often Lifting heavy weights should be avoided for few days and breaking your posture every 30 mins.