Ugly river - I play like donkey?

[ipp147]

$100PL on Party.

Fairly new to the table so no real reads. Effective stacks are $100.

UTG Limper and EP raises pot. CO calls and I call in the SB with QJT9. Original limper calls.

4 to the flop for $19. Q [img]/images/graemlins/club.gif[/img] J [img]/images/graemlins/heart.gif[/img] 8 [img]/images/graemlins/diamond.gif[/img]

I check and whiff like a donkey as its checked around.

Turn is the T [img]/images/graemlins/club.gif[/img]

I bet pot. UTG folds. EP (pfr) calls and CO folds.

River is the A [img]/images/graemlins/spade.gif[/img]

I check. Villain bets pot ($57ish). I fold.

2 questions,

Is my river play correct? Is there any chance he is potting with top set here after my check/bet/check?

Is it correct to attempt a check raise on this flop or will most pfr's recognise the dangerous board and check behind here without a big piece of it?