I suggest you go for advanced physiotherapy.

The ultimate solution for a young adult such as yourself will be to work on the cause. The musculature surrounding your neck and upper back may have weakened which in effect causes spinal degeneration and disc prolapses. Heat packs, electric modalities can help clear out your symptoms completely but the long term goal remains full resolution of the problem. Work closely with a physical therapist and seek his help to strengthen your neck and upper back to avoid any such episodes in the future.

Yes. Cervical collar during work. Laser physiotherapy treatment for few days

Use Back Support. Self Massage the back of neck.

Manual therapist like me can push the bulged disc back to it's normal place. For more info visit naumika.com

Heat will help with reducing pain in cervical spondylitis but you need to limit the heating to not more than 10-15 mins at a stretch. Also consult a qualified orthopaedic and physiotherapist for further treatment options. Correct stretching exercises and treatment will help you in the long run.

Report must be seen by your physician/orthopedecian and the consultant physio. Hot pad can be used. It will provide relief. Combine it with exercises under the supervision of your physio.

Sure you can use.

"5 Tips to Reduce Cervical Spondylosis Pain" by Dr.Pooja Pandey Tripathi(PT) - https://www.practo.com/healthfeed/5-tips-to-reduce-cervical-spondylosis-pain-35878/post

Heat pad can be used to relieve pain and muscle spasm. But the effects of this heat will reach only till the subcutaneous (under the skin) level. What is needed is a deep heating treatment  like shortwave diathermy which can reach your spine. Most physio clinics will have this treatment.But nevertheless heating  pad will relieve the pain temporarily.

Consult with a physiotherapist who have orthopaedic experience for proper assessment and treatment.