That phone is gone, there is probably nothing left in it that's "yours" since you didn't install anything.
[This is for the future]
I misplace my phone a lot when I go from back and forth places. Also, the hardest time I misplace my iPhone is at home. Find My iPhone is useless is since I already know it's here. But, I don't look at that. My landline phone is also connected via bluetooth to my iPhone. I just look at the landline phone and see if there is a connection. If there, phone is in the house. I can try and send it that repeating sound and hope it's not muffled at all. I do this also with my with my BT car audio, still working on a BT for me. This may not be the best way to search for a lost/misplaced. But, it works for me.