Thanks for query on HCM.
It is most likely due to severe exhaustion,fatigue
Heavy exercise,work load and less sleep always affects sex performance.
Don't worry,It is for only time being.
Take enough rest,sound sleep.
Spend more time in foreplay,make some mood by playing music,using room freshener.
,minerals supplement to boost up your general health.
You will definitely do healthy sex after all this management.