My tenant has missed their first rent payment. I need advice/tips

[Alexus Bell]

Hello,

I am 27 with two doors one in which I am househacking and the other is a condo. The condo tenant has missed their first rent payment. I am seeking advice on next steps and any tips. read below for further background. 

Background: I am a novice and found BP after I bought my second property. I made a few mistakes in picking my tenant (which I realized after reading Brandon and Heathers book) but I want to do better. The tenant has never paid rent early or right on time but this will be the first late payment and they haven't reached out with an explanation or any response. I sent a small reminder, about the associated late fee with a late payment and have heard nothing.The property is in Georgia and the tenant is brand new this is only month three. I am thankful for all help. I am just getting my foot in this world and I don't want a huge hit that prevents my further progress. 

Thank you in advance for all your advice. 

- Alexus