Hello everyone) A baby has pus or discharge in one ear. It doesn't seem to…

Hello everyone) A baby has pus or discharge in one ear. It doesn't seem to bother him, he even cleaned it without problems for a couple of days. Today he is very nervous all day, sleeps poorly and cries sometimes without apparent reasons. I think it could be an earache or colic. In general, we wrote to the doctor about the ear, tomorrow for an appointment, but maybe someone has encountered this? What could it be exactly? It's like they haven't cleaned the ear properly for a long time and everything came out, but only in one