noise from front brake?

I had a wheel rotation done recently. I'm not sure if these events are connected, but soon after I noticed a new sound coming from the front left wheel when I press the brakes lightly. The sound goes away when I press the brakes down fully. It's sort of a squeak or chirp--one for each time the wheel turns. There's also a low, whispery sort of scratching or rubbing sound (like fingernails on cardboard), also once each wheel turn. When I roll down the window and listen carefully, I can hear a third sound, like the sound when someone drums their fingers on a table. All these sounds are coming from the front left wheel well. I'm leaving for a 10-hour trip in two days, so I'm sort of concerned. But I want to be armed with some knowledge before I go do psychological battle with the mechanic. Any ideas? Thx in advance.

sounds like when the tires were taken off, your rotor might have popped off a little, and is not spinning perfectly straight. or could just be that you need to change your pads.

I drove it on the interstate this weekend, and noticed that at high speeds I can feel a vibration through the pedal when I brake. Also, when hitting a bump going very slowly (15 or so), there's a metallic rattle that comes from the wheel, but I can only hear it when my window's down. Otherwise, it's just the squeak and rub at slower speeds. This only started happening after they rotated my tires.

make sure the dust shields arent hitting anything.

How do I do that? I'm a car idiot, you should know.