I would actually have to seen the electrocardiogram to answer your question. However, please be aware that the Q wave may be quite tiny in some of the leads and might be interpreted as not being present. In the left chest leads a small Q wave indicates that the early electrical impulse is moving away from the lead, and that is normal.
I am assuming that your electrocardiographic exercise test using the Bruce Protocol was read as normal by the attending physician, though you don't tell us how long you exercised and what stage you achieved.
Please be aware that I am unable to diagnose medical conditions online.