Everytime there's a respiratory 'bug' passed around in my office, I pick it up and end up with breathing problems that take a long while to go away. My SLE started (well...at least the first really obvious symptom) was pericarditis, and that and breathing or respiratory stuff has been my primary problem ever since. I don't have a lot of other symptoms, so I guess sometimes that's just where the inflammation has chosen to attack. So far, no asthma, but pleurisy and pneumonia - I feel for you all. It can be debilitating.
"If you trust Google more than you trust your doctor than maybe it's time to switch doctors."