Been there, had that happen too.... When I reset my computer, I lost over 550 followers even though I used the only npub I ever established myself, to get back on Nostr.. I'll follow you here, to start you building again... I also find that even if someone follows me, I don't necessarily see them populate my followers list. As of now, I might have 4 or 5 followers... It sucks, but it is what it is.. Maybe the one relay that was keeping my followers got out of the game or something.. I don't know it that's possible or not.. Good luck