What Are The Side Effects Of Steroids In A Child?

My doughtier is 9 month old. She had a pcp lung infection and was treated with antibiotics. In a biopsy we have done 7 weeks ago, we found Mack as well. She received preventive medicine once a week together with anti fondus. 4 weeks ago we discovered Mack in her gi, so she started full treatment for Mack. She is diagnosed with low t cell and was on steroids for almost 3 month. Two weeks ago we stopped the steroids and she was fine. Last two days we found out that she breath ver fast. 40 when she sleep and 60-80 when she is awake. We r very concerned. What do u think