Welcome to JustAnswer! I am a licensed veterinarian and specialist and will do my best to assist you today!
What color is the is discharge from the nose?
No visible discharge Just sniffle sounds
Ok - excellent!
Is there a fever?
Ok - great!
This is something that is often viral - not bacterial, resolving without worry or need for intervention!
If all else is normal, eating, playing, etc - there should be no problem waiting to see your vet on an appointment basis.
You are very welcome!