Make sure she gets plenty of fluids, lots of rest as the more active she is then more she will cough, and eats well. Add warm water or low salt chicken broth to her food. The better hydrated she is the better she will feel and the thinner her respiratory secretions will be. You can take her into the bathroom with you when you take a hot bath or shower so she can breathe the steam which is soothing to her airways and thins mucous, making it easier for her to breathe. You can also use a humidifier in the room she sleeps in,
Her cough should slowly resolve over the next 2 to 3 weeks. Most of the time these dogs feel pretty well so it's a matter of keeping them quiet and suppressing the cough if we can.
If the cough is very bad you can use human cough/cold medications with Guaifenesin (an expectorant) and Dextromethorphan (a cough suppressant) only such as Benylin or Robitussin DM can help. Give 1 teaspoon per 20 to 25 pounds every 6 to 8 hours.
If she is running a fever this is almost certainly a contagious infection and if she is running a fever and is lethargic then an examination is definitely warranted as pneumonia may have developed. Rarely this can be a sign of canine influenza, but those dogs tend to be much sicker with a very high fever and severe lethargy. If she suddenly gets much worse and has a high fever she should see her veterinarian. Aggressive supportive care can save her life with a bad influenza infection. Make sure to let them know her symptoms when you are bringing her in as she should be quarantined.
You do want to keep her away from dog parks, the groomer, doggie daycares, and neighbor dogs, and ideally she should not be walked so she doesn't spread this. It has been my pleasure to help you today. You are welcome to ask follow up questions about my response here, simply use the reply box and let me know. Thank you!