Hello, your baby could have an upper respiratory infection at this point which could have led into a form of herpes virus as well. I would suggest getting your baby to the vet as soon as you can so that they can get her started on some oral antibiotics and some ointment for her eye as well. If however the actual eyeball itself is swollen it could be related to trauma or an infection that is causing the eyeball to swell with pressure. When this happens this is called glaucoma. Either case should be addressed by your vet as soon as you can so that it can be treated promptly so no permanent damage occurs. Here are a few links to information on the conditions I mentioned above.