I have studied your case.
As per your symptoms cause of tightness can be cardiac related.
There is possibility of cardiac congestion.
I would like to ask some more detail question about your symptoms.
Was there sweating associated with it?
Do you have history of hypertension?
Another possibility due to compression of this nerve root
there is pain in your rib and chest.
I will advise you to do MRI thoracic spine, and EMG- NCV [nerve conduction study]X ray
may not show details.
For these symptoms analgesic
and neurotropic medication can be started.
Till time, avoid lifting weights, Sit with support to back. You can consult physiotherapist for help.Physiotherapy
and interferential therapy will give quick relief.
I will advise to check your vit B12 and vit D3 level.
Hope this answers your query. If you have additional questions or follow up queries then please do not hesitate in writing to us. I will be happy to answer your queries.
Wishing you good health.