I've been on a big losing streak which has seriously injured my bankroll and my sanity. So now instead of playing I will come and post here until I can get over my new "all tilt, all the time" feeling. In three days I had AA, KK, and/or QQ a total of 12 times (6 of which were AA) and lost them all but one. Most of them I was all-in preflop, but a couple of hands I have questions on. I don't have "real" hand histories but I remember the hands very well. I wish I could forget them.

1) I'm playing on PokerRoom 5-max (I do all my playing there because I like their software the best) at what they call $1/$2 but which everyone else calls $0.50/$1. I have QQ on the button, one player calls, I make minimum raise, he reraises to 5xBB. Opponent is not particularly loose or tight or particularly anything. I go all-in. Opponent calls, turns out he has KK, I lose. Was this a bonehead all-in?

2) Same environment (different table/opponent). I have AA in big blind. Everyone folds to the small blind, who calls. Not wanting to push him out, I make minimum raise, he calls (results $4 pot). Flop comes 6-8-9, two clubs. Opponent checks on the flop. Thinking this could be a bad flop to let him draw on, I bet $10, opponent raises, I go all-in, opponent calls. He turns over 7To, I lose. Was any aspect of this play stupid or did I just get unlucky?

3) Should I be playing at 10-max tables instead of 5- and 6-max? My pre-flop play is (in my opinion) pretty good, my post-flop play is ... not as good. I was more or less a break even player at the $100NL level shorthanded until this recent streak where I lose with AA all the time.

The reasons I have been playing at shorthanded tables are:
A. I started playing for play money at shorthanded tables because that's what's on TV; now my brain is calibrated to think in terms of 5 or 6 players and I never really tried full games. (I do play Omaha full tables, but that's very different).
B. It's easier to get the seat you want. If you want to sit just to the left of the maniac you can.
C. I only have to keep track of 4 or 5 players' playing styles instead of 8 or 9.