Was this fold weak?

[SA-Bishop]

I usually play micro ring games, but I've been taking stabs at SnG's because they're more interesting. I think that I've been making some weak folds and this might be one of them.

Pokerroom 5+1. It’s still early and the blinds are 15/30. I have t1470 in the BB and see a free flop with 52o.

Four to the flop which comes 4s,5c,2s. I led out by betting 150 into a 120 dollar pot. It was raised to 300 by someone in LP and I call with 3 players to the turn.

The turn came [4s,5c,2s]Ah which I liked because now an ace might call me down. I check with the intention of checkraising. MP bets 40 and the LP raiser makes it 220 to go. I reraise to 400 and the three of us go to the river.

River comes [4s,5c,2s,Ah]Ad I check and fold to an all in bet of T580. This hand nearly crippled me.

Was the fold when the second ace hit the river weak/tight? The guy I folded to raised me on the flop, so I'm not sure what to put him on. I could see him raiseing that flop with AK or other overcards, and I suspose he could have a set. Should I have gone that deep with my baby two pair in the first place?