Hi M.,
I suspected an ear infection as well, and it wouldn't hurt to take her to the doctor to find out for sure. If she does have an ear infection, I would recommend some very good homeopathic remedies, before trying the antibiotic. I say this for several reasons. Most ear infections aren't helped by antibiotics, they are viral, so by giving her an antibiotic, it is just wiping out all of the good bacteria that is in her system and leaving her open to a whole bunch of secondary infections. Also if you are giving her tylenol or motrin to combat her fever, it is also crippling her body's defenses against the bug that is making her sick. Also they are hard on her liver and kidneys. Every drug has a side affect and make no mistake, they are drugs.
I found a really good ear treatment at a healthfood store in bellingham on the corner of lakeway right where it runs into Holly st. It is called mullien flower oil and it also contains garlic oil, which is a very powerful antiviral and antibiotic. Another thing that works well is to put breast milk into her ear. Does she prefer to nurse on one side over the other? When she nurses, the mild flows over one of her ears from the inside, so make sure she nurses on both sides. To help with fever, try cool compresses and just keep nursing her as often as she will. Don't worry about pushing solid foods right now, breast milk is the perfect food for her. My daughter got an ear infection when she was teething and the above methods worked very well for her. Also it enabled her body to build up immunity, and she never got another one. I am so sorry she is sick, it is so hard to watch our little ones be sick and it feels so powerless. Just hold her when she is awake, and get her to sleep as much as possible, it will pass soon. Good luck and good health to you.