I was going to suggest that if it was going east to west it couldn't be a satellite because, unless they are geo-stationery. they orbit the west to east. Or are there any exceptions?
Saw a satellite a few weeks ago at about 11pm: appeared in the west looking very like an aircraft landing light at altitude, but its transit was much too fast, the light was still visible after it had passed overhead, no sign of strobes or nav lights. No noise either!