Turned a set of nines

[tpcslj47]

Hero 99 in SB

4 limpers, i call, bb checks

Flop 5-7-10 rainbow

everyone checks

turn 9 (no flush draw)

i check, LP bets, button calls, i raise, others fold and those 2 call

river 4

I know that doesn't help either of them but i got a weird feeling here and decided to check, they both check so i think damn i missed a bet and turn over my 99 thinking i got this for sure....button turns over 6-8....yeah the button checked down his straight.