Hello and welcome,
It feels to me like you may be experiencing anticipatory anxiety.
Anticipatory anxiety is where a person experiences increased levels of anxiety by thinking about an event or situation in the future. The worries you experience specifically focus on what you think might happen, often with catastrophic predictions about the event. You posted "pondered the incident and wondered whether it would happen again".
To begin treating anticipatory anxiety, we must be able to admit that we cannot predict the future. Any scenario we are able to imagine is nothing more than speculation and fabrication.
Picturing positive outcomes can significantly reduce apprehension, which can lead to increased levels of confidence and an overall elevation in mood.
When you find yourself wondering, "What if..." Stop! Take a deep breath; breathe in through the nose, hold the air in your lungs for a count of four, then slowly let the air out through the mouth. While you are doing this, consider the possibility that you are being unrealistic and irrational. Focus on positive or neutral outcomes.
If I may suggest perhaps it is time to seek out a new physician that is willing to work with you and the anxiety your are experiencing. I see a therapist and find this to be very helpful.
Please know we are here to support you.