It seems you had an allergic reaction to Chloroquine. It will be good if you take the following therapy for the remaining problems:
1. Steam inhalation with Karvol plus twice a day : this will act as a soothing agent to your throat.
2. Tab. Allegra 120 mg once a day for 5 days (this is an anti-allergic which does not cause drowsiness)
3. Tab. Domstal 10 mg thrice a day (to control your nausea and vomiting like sensation)
The difficulty in speaking should settle down with voice rest and steam inhalation.