Thanks for your question on Healthcare Magic.
I can understand your concern.
Since your
chest discomfort is associated with specific position (driving position), possibility of muscular spasm and
musculoskeletal pain is more for your symptoms.
But better to first rule out heart related diseases because left sided chest discomfort is common in heart diseases.
So first get done ecg and 2d echo.
If both these are normal then no need to worry for heart diseases.
Follow these steps for better symptomatic in muscle spasm.
1. Avoid movements causing pain.
2. Sit with proper back support while driving.
3. Apply warm water pad on affected areas.
4. Avoid bad postures in sleep.
5. Avoid heavyweight lifting and strenuous exercise.
Don't worry, you will be alright with all these.
Hope I have solved your query. I willI be happy to help you further. Wish you good health. Thanks.