the flop was 2-2-2

[FrontonPoker]

a local dog track holds daily tourneys, $45 buy in, no rebuys, start with 1500 units, blinds start at 50/100 go up every 15 minutes, top 10 get paid..
at this point in the game i have 2200 in chips, i am on the button, and dealt AQ [img]/images/graemlins/diamond.gif[/img].. it is 400 to call.. four callers, stacks are (after calling) 1000, 2800, 1500.. i raise to 1200, small and big fold, and get two callers..
the flop is 2-2-2.. now the small gets up screaming and hollering, so we can figure where the 2 was (later he SAID he had T2s) everyone checks to me, and i check as well (was this my mistake?) turn is a J, everyone checks, i go all in 1000 (second mistake?) everyone folds except for one caller, who was holding the jack.. the river was 9.. should i have gone all in after the flop? after a pre flop raise they could have out me on a pocket pair..