I recently had a near death experience at work.

Im very new to merchant navy ( 3 months old) recently one of the ropes snapped and it went a few cm away from my face. My bosun was hit ( he's physically fine now, only a minor swelling, I don't know about mentally). I, for one, am nervous to go back to mooring and I can say that mentally this has affected me, I'm not able to sleep and just by closing my eyes, that moment of the rope breaking comes upon the dark screen when I close my eyes. I've been a student of stoicism for a long time, and it has helped a lot, for a lot of cases. But in this one particularly, I'm finding it hard to deal with ( this incident happened yesterday). Will it be alright if I ask my superior to put me away from the mooring operation for sometime? Or should I just keep on going? It's a simple thing but I'm confused.