I'm beside myself. My son often gets laryngitis and bronchitis. He just got over it, and on Saturday…

I'm beside myself. My son often gets laryngitis and bronchitis. He just got over it, and on Saturday he started coughing again. Yesterday we went to the doctor, and they heard wheezing on the right side. We did an X-ray, but the image was clear. We didn't sleep all night. He wouldn't say himself that he was having trouble breathing, but he's breathing fast and grunting with every exhale, even at rest. I can hear his breathing – it's not wheezing, but kind of whistling. In the morning, I got scared and called an ambulance, and they took us to the hospital. They said he needs to be tested for asthma, although they admitted it's difficult at this age. Or it could be obstructive syndrome. They sent us home. Other symptoms include a fever, sometimes 37–37.3°C (98.6–99.1°F). I found a private pulmonologist for tomorrow. For now, we're doing nebulizer treatments: Berodual, then Pulmicort. Saturation is 98%. I'm lying here crying, worrying so much. He's still breathing fast. He slept poorly all night, moaning, crying, and twitching. We got very little sleep.