I wanted to ask you about backbiting . I’m currently 18 and I am sure I have done gheeba sometime in the past years. I am really careful now but i’m really worried because I don’t know who i’ve done gheeba about in the past to ask for forgiveness from them. The thought of all my hasanat leaving me really scares me. Please give me advice.

If you do not know who you have done gheebah of then just sincerely repent to Allah and believe in His forgiveness. Allah is Most Merciful