Airtag Traveling With You

Hi! TYIA for your help. This is a first for me, but I received a notification that an airtag is traveling with me. It shows in red the path I drove this AM. No noise is playing, half the time says not in range.

I downloaded Airguard, nothing detected in my car or around me. Highest I can get it is 70%. Is this a weird bug? I keep an Airtag in my car, but that is sounding and working fine in the Find My app.

No family or friends that would keep tabs on me. Searched my car, wheel wells, under, can't find any devices.

Any thoughts on this would be appreciated <3