A hearing for 32-year old Dawnette Knight was postponed Thursday after Knight was allegedly 'groggy' from sleeping pills. Knight, accused of sending letters threatening actress Catherine Zeta-Jones, took two pills she bought from someone at the Los Angeles County Jail where she's being held. Zeta-Jones and her husband Michael Douglas both testified against Knight on Wednesday. During the hearing, Zeta-Jones said she felt 'overwhelming fear' and read from 19 of the letters sent to her. Knight was arrested on June 3 at her Beverly Hills apartment after authorities traced letters and phone calls. Knight is charged with one felony count of stalking and 24 felony counts of making criminal threats. She is being held on $1 million bail. The hearing is expected to resume Friday.