We had a guinea pig for a long time but he also had gooey eyes took him to vet and he was given ointment as he had an infection and it sounds like all the same symptoms he feels safe in the corner as he wont be able to see well for now till you can get him there we use to just cuddle him and stroke him just to reassure him hope this helps
My Guinea Pig Is Breathing Really Fast And Making Snorting Noises As He Breathes He's Not Really Eating And His Eyes Are Really Gooey. He Won't Move Out Of The Corner?
Sounds like he needs a trip to the vet... When small animals get sick it doesn't take long for them to pass on....