Hi again Mac
I fully understand your fears about taking the steroids, I went through same feelings when Doc first suggested them for my son, I was extremely reluctant to let him have them, he was only 3 yrs old at the time, and until then had been taking Ventolin when needed. At this stage symptoms were mainly cough, only wheezed on a handful of occasions, but he was getting worse.
I can only speak from experience, but Doctor was very understanding of my fears, and took time to explain pros and cons. As the steroids are inhaled, they are reaching straight away the only place they need to be, the lungs, not flooding the entire body. From what I understand side effects are very few and far between on inhaled steroids, but it may be useful to read the small print on the instruction leaflet, I don't have one to refer to from Pulmicort. The Doc explained to me that the risk of not using them was far greater than using them because of the risk of permanent lung damage from repeated inflammation (if your chest is tight, you have inflammation even if not wheezing).
My son's asthma nurse has always told me, and more recently him now he is older, that to stop the steroids suddenly can be extremely dangerous. I assume this is because it could cause a serious attack, which I know can be life-threatening. Don't panic about this, it's not all doom and gloom, Jake's asthma has progressed, he now takes Bricanyl as a reliever, Serevent as a slow acting reliever, and Flixotide is the steroid inhaler which suits him best. He has occasionally needed oral steroids for short courses after a particularly bad attack, we both hate him going on these, but he has suffered no ill-effects.
This does not mean that your asthma will progress in the same way, in many people it is very occasional, and can go away completely. Important thing is to try and identify triggers, and be prepared. Jakes triggers are infection, and animal hair. If anybody in family has a cold or cough, or Jake starts showing signs, we immediately increase his dose of Flixotide, and he takes Bricanyl 4 times a day, which sometimes staves off any bad asthma attacks.
Is there a specialist asthma nurse at your GP surgery? They are usually remarkably well-informed and a mine of information, often more so than the Doctor.
Sorry for the long post, hope I've not banged on too much, wish you luck and good health, if you have any more questions feel free to ask.