:wasalamex
The main thing is that you should continue repenting.. hoping for Allaah's forgiveness.
I'm not going to give you a ruling or anything, but if you look at the time of the the Khalifah of Abu Bakr, may Allaah be pleased with him. There was a man who apostated and pretended to be a prophet, and he lead many people astray. But after that he repented, became muslim again and fought for the sake of Allaah and got shaheed.
So inshaa Allaah, Allaah accepted his repentance since he was sincere even though he lead many people astray.
On the authority of Anas (may Allah be pleased with him), who said: I heard the Messenger of Allah (Peace be upon him) say: Allah the Almighty said:
O son of Adam, so long as you call upon Me and ask of Me, I shall forgive you for what you have done, and I shall not mind. O son of Adam, were your sins to reach the clouds of the sky and were you then to ask forgiveness of Me, I would forgive you. O son of Adam, were you to come to Me with sins nearly as great as the earth and were you then to face Me, ascribing no partner to Me, I would bring you forgiveness nearly as great at it.
It was related by at-Tirmidhi (also by Ahmad ibn Hanbal). Its chain of authorities is sound.
May Allaah forgive you and us all for our wrongdoings, ameen.
:salamext: