Never play poker when your mind is not 100%

So I get off work today, and my dad says Roxbury Casino has a 110 dollar tourny tonight. So im like COOL! ill play. I'm basically card dead the whole tournament, never tried to make a play, just pretty much ABC poker, til I finally pushed with A10 and was called with 55. Flop a 10, but he rivers a 5. Then kinda upset I was card dead, I played some 3/6 limit, I bought in for 100. After a few uneventful hands, im down to about 75 dollars. I have Q10 hearts in BB, it was raised UTG with like 7 other callers. Flop is queen ten seven, its capped turn is 2 of hearts, capped to the turn with me and this other guy. At this point I tell the other guy you can beat two pair?, so i check the river, and FOLD! THINKING 2 PAIR WAS NO GOOD, WHILE I ACTUALLY HAD A QUEEN HIGH FLUSH!!!!!!!!!!!!!!!! I FOLD MY HAND FACE UP SAYING TWO PAIR NO GOOD, HE SHOWS A SET OF QUEENS, THEN SOMEONE SAYS YOU HAVE A FLUSH!! BUT I ALREADY MUCKED!.............................THE POT WAS WELL OVER 100 DOLLARS! JUST GOT UP FEELING LIKE A STUPID JACKASS AND WENT HOME.........