AT - this hand is hard to comment on without more details. judging just on the blinds still being fairly small, there are probably too many people still in, people aren't really that desperate yet, and you need to be careful calling a push with it. when the blinds hit 100+ and people get desperate, go for it.

44 - limping is fine preflop. after the 250 flop bet is called (is 250 not an overbet?), check/fold. 250 is a strong bet, it got called, in a pot with many limpers. who called you that you're beating?