What should I do in these situation? Should I fold it PF? or?
Generally speaking lacking info:
You need to be thinking right away what your opps range is for calling the pfr. Is he tight? Loose? Calling station? Pos. player?
If he's a position player, he's probably 3 betting light.
If he's a Calling Station - he probably has a strong hand because calling station normally limp and call, not raise.
If he's tight then what is his range? If he's vpip is low, I might fold it. Otherwise I'm seeing a flop and hoping to out flop him and stack him.
If he's loose, I might just call or do a nice size reraise.
On the flop: If it's a wet board against the calling station or tight player, I'm probably check/folding.
If flop is wet/dry against the loose player or pos player, I'm probably betting into him, maybe 3/4 pot - whether I hit or not. At this point against these players, your AK is probably the best hand.
Any hands you are not sure of, post them in the HH for review, it is really helpful.