Thanks for your question on Healthcare Magic.
I can understand your concern.
Since your
nuclear stress test is normal, no need to worry for heart diseases.
Yes, it is possible to have non cardiac cause for your
chest pain.
Most likely cause in such situation is
musculoskeletal pain.
So avoid stress and tension, be relax and calm.
Avoid movements causing pain.
Avoid heavyweight lifting and strenuous exercise. Avoid bad postures in sleep.
Apply warm water pad on affected areas.
Take simple painkiller like
ibuprofen.
Don't worry, you will be alright. Don't worry about heart diseases.
Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.