WHOOO HOOOO way to go!!! When I first started biking I think I made it about 3 miles and then collapsed. Give it time it just gets easier as you go.

I hear you about the asthma thing. I've never had a problem until this past year and lately have been having symptoms of excersice enduced asthma. Looks like one more thing I inherited from my Dad... Which reminds me I need to make an appointment with the DR about it!

Anyways, just have a blast with your bike and just take your time, every week you will find yourself going farthur and farthur!!