his not feeling well

Last night my husband took our son to the emergency room because he could hardly breathe. Earlier that day the school nurse called us and told us about our son. He was not feeling well so we decided to take him to the hospital. After a few hours the came back home and the doctor said just give him the treatment we used to give. Last night he could not sleep and we just kept checking on him. We are really worried about him. I hope he gets better today. I do not know what he did yesterday or what’s in the air to trigger his asthma. We might take him to the doctor today. I hope he feels better soon.