Immune sytem symptoms and conditions

So far i am a 14 year old boy facing prednisone and have been on this drug over 4+ month periods at 10 mg first time and 100 second time. I have chrons's disease and it is hard to treat when it has a flare, so they have to put me on prednisone. I have experienced some of the worst side effects imaginable along with many other suffering victims of this drug, and they include: Headache, Severe Acne, Flu-Like Symptoms, High Blood Pressure, 50+ Pounds Gained, Moon face, Stomach Pains, and Much More. After i have been weened completely off i have notice these: SCARY Heart Palpitations, Out of Breathe, Feels like something is beating in my stomach, and feels like my heart drops to my stomach like pacing.