Pflanze geht nach 2 wochen in die bluetephase und sieht sehr kaputt aus.

You are technically in preflower

Yes its possible for autos to start flower early. Not common this early but still can happen. Good luck with your grow.

In the diary on week 2, you can see the threads. I think she has entered the flowering phase way too early. Doesn't look like mites or mold to me.

Can you put a pic up of the actual white ur talking about please?

It wouldn't produce that early mate. Could be mold. But I can't even see any white. Are talking little white spots? Or stains? If so, more likely cause from nute water drying out on ur plant, try wiping it off, other than ive no idea what white your talking about.sry