My toddler woke up with his eye completely glued shut by this yellow gunk

While waiting for your appointment, monitor your child for any changes in symptoms that may indicate a need for immediate medical attention. Watch for increasing redness, swelling, or pain, as well as any discharge that becomes green or foul-smelling.
Keep an eye on your child's general behavior and health. If they develop a high fever, exhibit lethargy, or show signs of dehydration, such as dark urine or a decrease in wet diapers, consult a healthcare professional promptly.
10. How Doctors Treat Bacterial Conjunctivitis (and What Happens Next)
Once you see a doctor, they will likely conduct an examination to determine the cause of the conjunctivitis. If it is bacterial, they may prescribe antibiotic eye drops or ointment to help clear the infection. It's important to administer the medication as directed and complete the full course, even if symptoms improve.
Your doctor will also advise on any additional steps to prevent recurrence and manage symptoms. If the conjunctivitis is viral or allergic, they may suggest supportive care and managing triggers. Follow-up with the doctor if symptoms persist or worsen, to ensure your child receives the appropriate care.