From the history it looks like just viral infections as she grows her immunity will get better and she will improve.
Next Steps
Next time she gets a fever get a urine routine (clean the area with lots of water, in a clean bottle catch a mid stream sample), it's better to rule out any infection.
If she has repeated sneezing in the morning, running nose or blocked nose on most of the days, any family history of allergies then she will require work up for allergies
Health Tips
Don't use antibiotics for just 2-3 days of fever (unless prescribed) , give symptomatic treatment with paracetamol.