Don't Play Poker Tired

I tried another dollar tournament last night on Pokerstars. I was doing OK, then I started getting tired during a bad run of cards and lost my patience. I was about 13th in chips with 20 people left when I was dealt A6d in late position. I tried to steal the blinds and raised about half my chips. One person calls. The flop is garbage. I should have checked, but I put about half of what I had left in. The other person re-raises enough to put me all in. I called. They show a pair of 8's. Turn and River are no help and I'm out in 20th. Dumb play on a night I shouldn't have played anyway.