Should I be aggressive here?

[ErrantNight]

you're seeing monsters under the bed.

any time you find yourself on the later streets looking at the board going "ohmigod, i could lose to this this and this, and i haven't managed to fold my opponents yet! that means they could/probably have me beat!" you're playing losing poker.

fish calling you and playing passively DOES NOT MEAN THEY HAVE YOU BEAT.

you must value bet relentlessly. entering the turn you're confident you're ahead and until he raises you, IF he raises you, you're certain of this fact. having this turn get checked through would be horrible.