Question

When I sing into the microfon my recorded voice sounds really damped even though I got the exact same configurations compared to last time i recorded something.

Answer 1

How close to your source, i.e. your mouth, to your microphone?  There is something called "microphone proximity effect".  Essentially, the closer to your mouth the mic is, the less it picks up the high frequencies.  Try moving your microphone away from your mouth a bit.