Your not alone, there are many of us that suffer from
anxiety/panic
attacks including me. One real fact about
anxiety/panic
attacks is that, when someone has an incident that triggers high anxiety or a panic attack, later, if you dwell on it too much, just thinking about the incident or some variation of it can cause one to have another anxiety/panic attack. Since you hallucination was triggered by a drug, chances are that you will not start to randomly hallucinate. but to answer your question.