Being threatened on Facebook marketplace

Hello, I'm currently being treated on Facebook marketplace and have no idea what to do. This first started when I was selling my jacket for a price of $80, this lady, for the context of the story will be named Sarah. Sarah wasted my time, saying she would come to pick it up multiple times and it ultimately things never went through. So after getting no offers for this price point, I listed it for $70 which prompted her to reply once again, saying she could pick it up, I tried to double-check that this wouldn't be an empty message filled with lies, and she got angry saying I was blowing up her phone. So I apologized, explained my side of the story, and sold it to another seller. This morning I got a message that Sarah and her brother would be showing up to my address searching for me, to "watch this" and that I've "Played myself" and that they would be out here by 4 pm. I already filed a report with the police but I'm unsure on what to do now and I need to walk home at around 3p, so I'm not sure what to do. please help

UPDATE: Lady or her brother never showed, I never really expected her to show after you guys calmed me down. I live in a rather small town where there’s hardly any crime so something like this is the only thing the police force even has to focus on also. Thanks guys I followed all your advice besides the writing her name on a bullet and sending her a picture 😂 I now feel much safer