I Need To Survive My Asthma

Patient: Dear Sir,I’ve been a Asthma Patient since Last 6 Years .. And I was an Hard worker too.. And last week I Joined for gym , I Used to Push ups 60 – 70 But Now i Cannot do, When I Take Cardio I Felt My Heart is Stucking.. Why Its coming Like this ?? And Is this Possible To Survive in My Asthma ?Kindly Hope your Valuable Reply,Thank you ..Fasil Abubacker v.k