You need to get investigated.
Thanks for posting the query on HCM. After going through your query, I would like to comment the following:
1. You currently have weakness in legs and breathlessness. Do you have leg pain, chest pain
2. Considering your age and no risk factor for embolic phenomenon mentioned, it is unlikely that you have pulmonary embolism
3. You need to get evaluated by a Pulmonologist. Investigations required are chest Xray , colour doppler lower limbs
(if tenderness present), CBC, ESR
Thus get clinical evaluation by a Pulmonologist at the earliest.
I hope I have answered your query. I will be glad to answer follow up queries if any. Please accept my answer if you have no follow up queries.
Dr. Gyanshankar Mishra
MBBS MD DNB