Treatment recommendations symptoms and conditions

I wrote a post few days ago about Singulair and how great my daughter is doing since she started to take this medication three months ago.
Then I started reading about all the side effects that other children had because of Singulair. I GOT SO SCARED!
So scared that last night I stopped giving Singulair to my daughter.

From January to September my daughter had asthma every other week. She was put on steroids (prednisolone) every time she couldn't breath. Then in September the pulmonologist said we have to take control of the situation because so much steroids can damage a little body.
She made me feel I had been a terrible mothers since I always refused to give her singulair.
She convinced me and then I started Singulair, but now I feel worst because I have the feeling I am giving poison to my daughter even if her asthma is under control.

My 7 years old stopped Singulair 12 hours ago, I do not know what is going to happen now. Of course I cannot call the pulmonologist anymore in case my ds gets bad.
Somebody here said that she is giving her son Nordic Naturals Fish Oil, Culturelle probiotics, vitamin c, and changing his diet - increased magnesium and decreased dairy.I will love to have more information about this alternative way of controlling asthma. I do not remember who wrote this post. If there is a web site of a doctor I can contact i will do right away. I live in New York.

I need help. Thank you so much.