Bellagio 80/160 4 bet flop then check turn?

[DeezNutz3]

I haven't been playing long..it's a 6 handed or so game at about 8pm weekenight. I haven't played many hands and haven't down so far. I open 99 on the button and just the bb calls. He seems pretty solid, thinking player. Flop is 884r and he CRs I 3 bet and he 4 bets...I just call...planned to call down here? turn is T and he checks...I think and ck behind very confussed not wanting to get CRed and wanting to just show it down for 1 bet on the river...river is 4 he bets and I call...
Thanks,
Donny