Suggest Treatment For Acute Adult Asthma

I am an adult male, 25, and I suffer from acute adult asthma. My attacks get so bad that I sometimes black out. I lost my driver's license and it has greatly affected my ability to function normally. Thus far, preventative treatment has had very little effect.

I am scared to do anything physical. I have had attacks triggered from any and all known triggers, something as simple as walking to the mailbox can result in me being short of breath. When this happens I get panicky. My heart rate spikes painfully high and I feel thatmay be part of why I black out. On top of that the constant stress of trying to get by without a car and having my ability to be physically active gets me moody and stressed, often I snap at people for stupid things. It is starting to affect my relationship.

What can I do?