dead pixel question...

I used my 2011 macbook air for almost a year
my warranty ends at august
but weird thing happened recently
Three dead pixels just showed up
I'm very sensitive on dead pixel somehow..
I checked dead pixel when I bought my laptop last year
and there wasn't any that time..
can this even happen?..

Its in lower right corner side and its in bright white dot
I tried everything to fix it
used a software to fix it
rubbed gently with a cotton swabs..

Will apple do anything for me?
is it too late to get any help from them?
Can anyone help me?
its driving me crazy....