Nexplanon and plan B

Long story short got Nexplanon the 22of Jan, had unprotected sex that day( I know I’m stupid, stuff happens) that happened around 4-5pm took plan b that day around 6-7pm. Before I got the Nexplanon in my app it said I was supposed to get my period on the 19th of Jan. However my period usually last 7 days and the last period started the 28th of Dec. I haven’t had a period since and had sex again the 7th day while on Nexplanon (29th of this month), took plan b yesterday the 30th. I just wanna ask what are the chances of me being pregnant?? I’m sorry yeah I’m stupid but I have a high sex drive so 🤷🏻‍♀️