Thanks guys for the replies, my camera is fine after all haha. I'm a newbie to photography so I make alot of stupid mistakes, need some time to know how to take care of my equipments properly.
Stupid thing is, I tried wiping my filter with a cloth(those kind used for cleaning spectacle lens), and when I wipe just a small bit it made something like a static sound. I stopped after trying it again for fear of damaging it. Hope I did not scratch it
Oh man.. Taking care of my dslr is even tougher than taking care of my partner haha.. It's nice to have people sharing advises here, thanks!