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There is a chance that you have compression of the spinal nerves in the cervical spine region as your neck hurts and feel the need to ‘crack’ the neck. This can happen due to overuse of computers, work involving straining of neck, canal stenosis, bone disease, spondylosis, poor posture etc. A few neck exercises, analgesic creams and sprays, heat pads or chiropractors can help relieve the pain, tingling and numbness.
With a history of cough, cold, headache, maybe fever and neck pain, meningitis too should be ruled out. A MRI of the cervical spine may be required. Please consult a neurologist.

Forehead aching especially on hearing music can be due to blocked Eustachian tube. It is a membrane lined tube that connects the middle ear space to the back of the nose. Its main purpose is to check the ear pressure changes in the middle ear.
Cold, allergies, sinusitis, or post nasal drip can lead to Eustachian tube blockage.

Try valsalva maneuver (done by taking a deep breath and blowing while pinching your nostrils and closing your mouth). If symptoms persist consult ENT specialist again as on net and without examining it is difficult to give a confirmed opinion. Hope this helps. Take care!