@woozy745– Good morning and I also welcome you to Mayo Clinic Connect. I also take PROAIR and it makes me shake. It is an albuterol drug and it is a common side effect. You need to ask your doctor about not using it if it makes your AFIB worse. I'm surprised that you were given this with AFIB.
I'm wondering what came first, your AFIB, or SOB. Usually, if you have a shortness of breath after starting a new drug it's a definite sign that your body is reacting negatively to the medication and it should be stopped. I say usually because there could be other factors like interactions with another medication or it's your heart.
You need to speak with your doctor about this and I wouldn't wait if I were you!