Hi N.---If the fever is gone she is likely improving, although with that drainage and a cough, it can take some time for the body to expell all of that junk that has built up fighting the virus.
Strep doesn't usually have all that coughing and mucous. You want to make sure that the cough med is an expectorant, something that makes the body get that stuff out! Keep her well hydrated, sleep elevated, give her warm baths with lots of steam in the room. Chicken soup with a bit of hot pepper is a great medicine. Hot foods make the mucous runny. I also like to make veggie soups with V8. Little ones may not like chunks of veggies so I would take the soup and puree it for the little ones.
Try to leave antibiotics as a last resort. It is really best to let the body do what it knows to do. Support her body with her diet...LOTS of fresh fruits and veggies are essential for a strong and balanced immune system. I have a great chart that shows what kids of different ages should be eating in terms of servings every day. I also have some other great strategies for getting more fruit and veggies into kids. I would be happy to share these and other great tips if you'd like.
I will be at a Vendor and Craft show tomorrow in Bloomfield Hills, at the Wing Lake School, 6490 Wing Lake Rd, nw corner of Maple and Wing Lake (just west of Telegraph). It is a fundraiser for their PTO. Come and do some Christmas shopping and we can talk about how to help your precious little one. Be patient and keep your daughter comfy. Watch for changes in breathing. Most likely, she will be just fine very soon. Good luck, D.