Coughing daugther 2 years old

My daugther is 2 and has been coughing for about a week but she’s not sick no fever none of that just a bit congested due to having a stuffy nose but for that we use nasal spray and shesback to breathing normal. But still coughs here and there throughout the day. What can it be or what can I do? Planning on taking her to the doctors Monday? She doesn’t seem having any trouble for anything else she’s her normal self