Negative streak - advices?

[Black winter day]

I have lost about 20% of my bankroll over the last 10 days.
I have reviewed most of the key hands in PT - doesn't really seem i messed them up that bad.
It started with a few horrible beats, then i was card dead, then misplayed a few hands...you know the drill.Then, i get frustrated and spew another pot or 2 and finish the session
.

I took a break for 3 days, came back today, before you know it, i am down another 500$,making it -2000$ overall.

No need to say, that my confidence in my poker abilities is really down.I can't find my A game.
I started in microlimits and turned 1$ into 10k.Gradually over 6 months or so.
So, i must be not that bad.
I've recently moved to 1/2NL,when i had about 7.5k, adjusted quite fast, went up to 10k and then this happened.

I thought a break would clear my head, but i went back to the same problems.
I was planning to move back to 0.5/1 Nl if i hit 7k, but perhaps i should just move back now and rebuild a little?
The problem is - i wouldn't have the same focus anymore, pots will seem smaller then usual and i might slip even further bankroll wise.

I am constantly reading books and forums, trying to improve my game, but it seems lately i can't hit anything and if i do, i am second best.Flush over flush, boat over boat...
Even straights are overpowered by higher straights.
I don't play 3holed connectors, but if i am in BB with 57 and the board is 468T - the opponent has 79.I can't fold it, i have to pay him off.Good thing, i didn't reraise in that particular example...
That is really making me see monsters under my bad and i am losing a lot of value with my good not nut hands.

Should i take longer break?
Move down?
Just continue playing , since it's probably mostly variance?
Read psychology books,may-be?
I have POP and Zen and the art of poker, but i haven't read them yet...Read "Inside the poker mind", though.

This is the biggest negative streak i've ever experienced - 10 full buy-ins, so i am quite lost.
I don't even tilt anymore, just some strange apathy, since i am confused.Things were going so well - i was really thinking i could make it as a pro.Not neccessarily the WSOP champion, but making steady living at 1/2 NL.

Good thing i didn't quit my job

Anyway, advices are welcomed.