Thank you for your query.
You have neither mentioned how you have controlled your asthma
nor any associated medical problem. A thorough clinical evaluation is required to understand your problems and I suggest that you consult your physician who shall be in a better position to guide you. It is very difficult to correlate your symptoms to the asthma or vasovagal attach that you had.
I hope I have answered your query to your satisfaction.
Wishing you all the best.
Rajiv K Khandelwal