Cough for past 2 months. Cough.

My five years old daughter is suffering from cough since mid December.. Consulted two drs.. first dr said mild wheezing and prescribed antibiotics and cough/cold syrup.. after completion of course also she was not well.. On and off she used to get cough.. Especially at night sometime after sleep.. She will cough heavily for few mins and get up from sleep.. Again while getting up in the morning she used to cough.. Last week we consulted another dr he said wheeze is there and suggested Nebuliser for three days and medicine.. Followed everything.. After checkup dr said wheeze reduce.. That time she didn't have cough.. It's been three days since we stopped medicine again cough started.. Day time she was fine.. While sleeping alone.. Cough she feels like vomiting.. what is the reason for recurrent cough.. Also she gets cough if she plays heavily.. But then it subsides in few mins.. please guide drs