Vacation bible school symptoms and conditions

I have a 4 year old whom was diagnosed with Asthma over this winter. She has always had coughing at night and Asthma treatment seemed to really work. We wanted to take her off the breathing treatments to build her system back up so she was given two months of Singulair. It seemed to work great. Asthma symptoms seemed to be controlled without puffers and nebulizers. However the last week which would be the 6th week on singulair she suddenly had severe separation anxiety. Even at Vacation Bible School which she loved and knew her teachers she had what I would call an anxiety attack which was completely not her normal disposition. I didn't put it together though until last night. She woke up and got in bed with me. After barely falling asleep about 3am she woke up screaming that there were bugs everywhere. She "saw" them and "heard" them and began slapping at her legs arms and face. At first I thought it was just a nightmare that I couldn't get her to wake up from. I put her in the shower and she still screamed. This went on through the rest of the night. She finally calmed down a little after an hour of histarics but still said she saw bugs. The more I thought about it I thought it may be the singulair and as soon as I searched for it I found this site. Needless to say she will not be taking this drug again. We will try to find some other way to treat her asthma. Thanks for all the insight.