Lost Apple watch, the location/last seen is not helping

Hello, I have lost my apple watch series 7 in a myserious way, here's how :

I was driving on the highway from point A (gas station 1) to point B (gas station 2).

• At point A (around 4:30 pm): I had my watch and it was on.
• At point B (around 8:00 pm): I couldn't find it, looked everywhere in the car, but it was not there.

So naturally, I open Find My app, my watch was last seen at 6:00 pm and it showed a location on the highway between point A and point B (around 100 km from point A).

I also marked my watch lost at 8:14 pm.

I decided to go back and check the 1st gas station (point A), and on the way, I stopped at the location shown in the 'Find My' app. To my surprise, the watch was now seen 1 minute ago a few meters away!

I actually thought my watch was there somewhere and kept looking for an hour with no luck.

I also went to Gas station 1 and looked but found nothing.

The weird thing is a few minutes after I got back home, I opened the Find My app and the location for my watch was home, also it last seen a few minutes ago!

I really can't understand how this can help me find the watch, 1000% not in the car or at home!!

Please help if you have any idea what's going on.