Noise when shifting into 2nd and 4th gear

[oxyi]

Hi there,

Long story short, dropped off my car for a car detailed job, and came back the car is behaving weirdly... I wonder why

Anyway, now when I shift to 2nd and 4th, I'd hear a subtle knocking sound as the clutch engaged into the the gear, it was doing it all the time, now it is just sometimes. What could've gone wrong ?
The other thing I noticed is that whenever I am on a slop now (like entering a plaza or center), and I break, I can feel rattling feedback coming from break pedal, and also hear metal hitting each other sound.
I forgot whether I am in gear or not, but maybe I am, I just pressed down on the clutch and break as I am waiting for the car in front of me to move, then the crazy rattling like something is about to break, so I just shift to neutral and it would be okay... anyone know wat's going on ?

Thanks!

[pikadosboy]

Take it to a shop and have them check it.

[oxyi]

yes.. that's one way of doing it.. and I am considering as well, just want to know if anyone else experienced the same problem before.

Like the metal hitting sound while breaking on a slope with clutch pressed.