I believe Divination and other sorts of readings specifically associated with life can be fairly useful in this case... Try to get this form of magic well covered and I'm almost certainly positive that you will eventually know what to do.
In addition to this I also recommend meditation over this. Focus on yourself. If you feel something off, something wrong, or something that doesn't feel like it belongs, then that is probably a sort of reasonable notification about your unfortunate occurrence. You may choose to be as creative as you want with the meditation you're going to attempt to perform in order to gain the specific information you need in a useful way which can be an outcome of the performed meditation. By being creative and trying to do something a bit extraordinary specifically designed for your particular case you will manage to draw the information easily since its designed for your case specifically and its also very inspiring / convincing.
Good luck on your quest. In case you got seriously robbed, I believe you should immediately call to the police and inform them about the robbery.