Child diagonised with bronchiolitis.

My 2 months son is diagonisex with bronchiolitis. He is having problem in breathing along with high heart beat . I am very scared of his condition. He has been admitted to a child care hospital from last 3 days. His condition becomes worsen during afternoon time daily which includes his breathing problem and heart beat which goes above 200. I am very worried for my child .Doctor is not ready to make me understand that what kimd of disease he has . I searched on google i understand it as some respiratory problem but it should have some permanent solution . Please let me know the correct treatment so that i can be assure about his health. When he was born that time also he was having some serious isssues regarding his breathing but was cured .from last 15 days he was having problem in digestion like constipation and gastric problem i thought it to b normal among my both kids. 4 days back he was coughing so badly and then he started breathing with difficuilty please post answer asap.