Brief Answer:
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Detailed Answer:
Hi my dear,
It is not in your head, and I do not see your situation from this point of view.
With regards to being out of breath walking just 15 steps might be related to any cardiac problem - for this, I'd suggest ECG, cardiac echo, or
stress test.
- Another possible factor could be, another problem related to
esophagus and heart, something which compresses the nerves passing nearby the diaphragm. X-ray or ct-scan are advised.
- Being nauseous might be related to problems of gall-bladder and its pathways. For this, I'd suggest abdominal
ultrasound, ERCP, echo-endoscopic exam.
If the doctors could not find anything, you can ask for
MRI.
Hope it helped answering your question!
Dr.Klerida
p.s. if you still feel to have more concern, please write back to me.
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