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Yes there are some significant interactions when these medications are taken together. Quetiapine, clonazepam, and codeine may interact causing increased sedation and drowsiness. However these may be given together by your doctor when there is an indication and this combination is beneficial despite the risk of sedation. Hence please do not discontinue any medication without consulting your doctor. Medications such as clonazepam should not be discontinued abruptly and only should be done on the advice of your doctor with a tapering dosage.
Hence if you are not feeling right then the next step would be to consult your doctor as soon as possible or go to the emergency or urgent care center. What symptoms are you having?