Hi, thanks for asking in Healthcare Magic.
Your pain appears to be due to TMD (tempero mandibular disease) rather than due to
heart attack. It often presents as pain and tightness in neck and shoulder, jaw and
ear pain. Inflammation and swelling of tempero mandibular joint increases the pressure on the
trigeminal nerve. This results in pain along the course of the nerve.
Check if you are getting a clicking noise when you open your mouth. Also find out if the pain is more while munching or talking or any other movement of jaw. Both these can be present in TMD. As your Dr mentioned, TMD can
stress the muscles that move the jaw resulting in spasm of jaw muscles and this spasm can be transferred to other muscles of neck and shoulder leading to pain.
Use ice packs to reduce swelling and pressure on the nerve. Avoid hard crunchy food and take soft food. NSAIDs like
Ibuprofen available OTC will reduce pain and inflammation. If the pain does not subside after taking Ibuprofen, or if it increases, then you can consult your treating Dr.
I hope this is useful to you.