If you forgot the pre-bleach, you can try to run the tail end of the process again, starting from the pre-bleach: pre-bleach, bleach, fix, wash, final rinse. This will correct the possible underbleaching resulting from the lack of pre-bleach.

Reticulation sounds very weird, it should not be easily possible with color films unless you have messed up VERY badly with temperatures. Retained silver (incomplete bleaching) can cause a grainy effect of similar kind.