Hebrews 10:26 , so scared .. can someone please help ?

What the passage is referring to is returning to another path of salvation outside of christ and that would be the law. If we keep on depending on the law to save us that is a continuance of sin for by the law none are saved, Once you have received the knowledge of Christ and salvation through his sacrifice and turned from it back to the law that now becomes null and void for you and until your turn from your ways and repent your salvation is lost.