Hello!
Thank you for asking on HCM!
Regarding your concern, I would like to explain that your symptoms don't seem to be cardiac related. 
Is this pain modulated by respiration or the body movements?
A comprehensive differential diagnosis between different disorders (like 
costochondritis, pleurits, 
pericarditis, a 
musculoskeletal pain, pneumonia,etc) which could mimic this clinical scenario should be done. 
I would recommend consulting with your GP for a careful physical examination, a resting ECG and a cardiac ultrasound, a chest x ray study and some lab blood tests (
complete blood count, PCR, sedimentation rate, kidney and liver function tests, blood electrolytes, etc.). 
If all the above tests result normal, the main cause of this symptomatology would be a muskuloskeletal pain. 
In such case, painkillers (like ibuprofen, 
acetaminophen, etc) for a short period of time would be helpful. 
Hope to have been of help!
Feel free to ask any other questions, whenever you need!
Best wishes, 
Dr. Iliri