I am very sorry to learn of your situation.
This book explains the dynamics of destructive cults and controversial LGATs (large group awareness training). You may find it useful in unwinding and sorting through your experience.
Stepping back and giving yourself space may be the best thing now.
This section within the Cult Education Institute is about recovery and may also be helpful.
This section within the database has information about coercive persuasion and influence techniques used to manipulate people.
Education is the best way to unwind undue influence.