Suggest Treatment For Vomiting, Coughing And Sleeplessness In Children

hi....I live in Wisconsin and have a 7yr...since she started school almost 2 years ago she gets sick almost every other week specially if she is in cold weather or near someone with viral infections, she always starts with runny nose then coughing and then vomiting, she can t sleep because once she starts with this problems she awakes every 10 to 20 minutes coughing and vomiting really bad. I ve been taking her to emergency room and to different doctors, they ve done a lot of tests for bronchitis, neumonia, allergies, asthma, sinus, reflex, they just keep giving me new medicine to try and sometimes it worked but not for long term....she was diagnosed with asthma at Children Hospital...is this asthma?.. she was taking albuterol but after a period of time she was worst every time she used, right after she takes it looks like her problems increased and we stop it, but yesterday they prescribed it again and now she is taking all these....ALBUTEROL-QVR-PRELONE-ZOFRAN-ZYRTEC...is this normal to take all this because for me this is a lot of medicine and I am scared to entoxicate her specially with steroids and because she was allergic to albuterol before... I hope someone can help me to find out what her problem is and to give me more information about side effects for these medicines......thank you............SUSANA