Thank you for your query.
It is very difficult to say whether the episode described by you was due to Suboxone
or a vaso-vagal attack which can happen at times of distress like the stomach ache. I would suggest that you should refrain from having Suboxone or any medication to which you are dependant. In case the stomach ache recurs than it needs to be investigated and managed accordingly.
I hope I have answered your query to your satisfaction.
Wishing you all the best.
Rajiv K Khandelwal