Go to Aga Khan Hospital and Look for Dr. Adil Waris. He is a Pediatric Pulmonologist. You can contact his office through 020 3662702.
If you can’t afford Aga Khan hospital, go to any paediatrician in a government hospital like Mama Lucy Hospital, Mbagathi Hospital, Kenyatta Hospital.
Another alternative for public hospital is Rhodes Chest Clinic (It is close to Technical University of Kenya.
There are two specialists that are likely to help with your situation. A paediatrician and a Pulmonologist.