I would prefer that you see your doctor sooner rather than later, depending on whether the shortness of breath you are reporting has worsened rapidly or has come on gradually. If the shortness of breath gets worse day after day, you should see your doctor as soon as possible, especially considering your cardiovascular history (embolism).
If the shortness of breath is stable but persistent, you should consult your family doctor to make adjustments to your asthma inhalers. If your shortness of breath is not due to a cardiovascular cause, your asthma is not under control! You may want to visit your family pharmacist to assess your inhalation technique to ensure that it is adequate. If necessary, he or she can also fax suggestions to the doctor in what is called a pharmacy opinion.
Shortness of breath, especially at your age, is not normal. I urge you not to hesitate to go see a doctor, and not to consider the potential waiting time if you think you will have to go to the emergency room or a walk-in clinic. In this particular case, your long-term health should take precedence over your daily routine.
I hope I have answered your question and look forward to hearing from you!
Sincerely,
Stéphane Villeneuve, pharmacist