It seems that you are offline, so I am writing you an initial answer. You may ask follow up questions later.
The chest pain after urination can occur due to;
1) Autonomic neuropathy.
2) Pelvic floor issue.
3) Spinal cord disease.
4) Interstitial cystitis
The other possibilities of the diagnosis are;
1) Esophageal spasm
2) Esophageal motility disorder
Having said that, you should get the following investigations done;
b) Echocardiography of the heart.
c) Ultrasound of abdomen.
d) Video urodynamics.
These should be able to clinch the diagnosis.
Please feel free for your follow up questions.
I would be happy to assist you further, if you need any more information.
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