Unhappy [Q] After update 4.3.3 Nexus 5 wont boot up

Hi Guys,
Just got yesterday the 4.3.3 upgrade. After Downloading it my phone is not coming up anymore.
The Nexus 5 isn't rooted and haven't touched it more than normal use.
The nexus just stuck on the 4 colored bubbles. they just keep spinning but that's it.

I went into recovery mode wiped cache + data. ( usually it takes no more than 1 minute right?) the "wiping..." procces took a lot more longer than usualy. I did those wiping many times and they just taking a lot of time! maybe its a problem or maybe its like that I don't know. I just know when I had HTC ONE X the wiping command on recovery didn't took that much of time.

anyway I wiped 20 times and still the nexus wont boot up.

Can I do something or should I go into the lab?
I try to avoid going to the lab because I don't like the idea somebody will open my phone and change the parts. there is a chance they will just replace it to a new device?

if not,
is there something that I can do? the phone is not rooted and I want him to stay this way.

Thanks