ANSWER:

Whenever you remember your sins you must ask for forgiveness if you really want yourself to be forgiven by The Almighty.

During my non- practising days i committed many sins including major and minor shirks , i repented and changed my way. But do i have to repent everytime i remember a sin i used to do earlier cause when i remember one sin the list won’t stop, is only repenting one time from all the previous sin enough?