A.J.
Hi E.,
Diane S gave you pretty good advice. I just want to add that flu like symptoms (sudden high fever, lethargy, body aches, vomiting, congestion, diarhea) is probably the due to having the flu which is caused by the influenza virus and can be deadly in young children. If it really is the above symptoms then you need to take your child to the dr. asap.
If the symptoms are cold-like symptoms (gradual onset starting with a runny nose, congestion, low grade fever or no fever, cough, crankiness) than it is probably a cold virus. Many common cold viruses cause eye redness & irritation and can lead to ear infection from trapped fluids in the ear which grow bacteria. To get rid of the bacteria you'll need an antibiotic and take it all as prescribed.
I too have been told by many dr.'s that teething does not cause ear infections. However that does not mean her ears are not uncomfortable. They probably are. If I have teeth pain, my ears hurt but they are not infected. But I tend to believe the much smarter than me medical profession.
This is cold and flu season so my guess is that most of the problems are viral. The pain and crankiness associated with teething will stop eventually. Unfortunately, you have a long road ahead with building the immune system so keep taking good care of her when she isn't well with extra love & understanding.
A.