Damn bro that sucks.. this was a lot harder than I thought its be too lol, but idk if transplanting at that stage would help.. when my leaves were yellowing I upped the EC by a lot, like from 1.1 to 1.8, she got some nute burn from it, but it slowed the yellowing and the innner leaves stayed green.
I know you're in organics right so maybe give her a really strong tea..