Hazardous Flop

[Gambler101]

I lost a considerable amount of chips on a flop that pairs

the board(E.g. 5 5 K).

In such a situation, if I have the K, should I bet, call,

or fold? I understand that a set answer cannot be diagnosed

permanently, but what if: 1) I am raised on the flop 2)

called on the flop, but raised on the turn after a blank

appeared?