Conjunctivutis in 10 month old

Tee

Hi I’m pretty sure my son has conjunctivitis and he seems quite upset by it, I rang the doctors to ask if it was something I’d need an appointment for if I could just go to the pharmacy and they said pharmacy as they no longer prescribe for it. I am going to the pharmacy later but in the meantime I just wondered if anyone had any advice? Or if it would be beneficial to give calpol?