Lisa
                    
                    
                    
                    
                    
                    
                    
                        
                        
                        Have you considered food allergies?  They can cause symptoms that mimic ADHD and would account for the congestion and other symptoms.  I do not know where you live, but find an imunologist and allergy specialist - I use Dr. J.Kaslow in Tustin, CA - you might contact his office for a referal to someone in your area.  Let me know how it turns out!