Had a talk with L's doctor. She said that she only prescribed singulair for seasonal allergies and if flovent & albuterol do not work. In L's case - it's different. He can remain on his inhalers without singulair since he has so much environmental allergies. So, with that, I've decided to stick with flovent and albuterol.
She also said that children generally catch up with their growing when they are off flovent. I'll try my best to keep him off it on the weekends and on holidays. I hope I'm doing the right thing.
This is definitely a load off my shoulders. I can concentrate on other things now and on fixing nutritious food for L & J.