Chronic respiratory problems symptoms and conditions

Need anyone say anymore!!! I am baffled at the comments made and relieved I felt the need to research this. My daughter is 4 years old and was prescribed Singulair a year ago for allergies and chronic respiratory problems due to undiagnosed (for a month) RSV at 6 mos. old. I put her on it (age 3) and something just wasn't right, cranky, crying, moody when normally she was not that way, so I took her off of it. 7 days ago she was having trouble breathing and at our urgent care visit the Doctor told us to start taking the Singulair again. I explained to him then that I felt it made her moody and depressed. He told me it doesn't take effect for at least a month. Stupid me, the Doctor knows better right?! WRONG!!!! Who knows our children better than we do?! She has taken 5 pills and I have a child that is all of the sudden having nightmares, acid reflux, DEPRESSION, crying spouts that she can't stop. WARNING....do not give your child this medicine...I am sick I gave it to her again and grateful it has only been a week. Hopefully these symptoms will disappear quickly.