When I was in grade 12 I had a drinking problem and chose to do a paper and presentation on teen alcoholism. I'm not too sure why I ever chose that topic,(probably because it was the one i knew the most about from the list we had to chose from)and it WAS very triggering, but i found it also to be very enlightening for myself. by you doing this paper maybe it'll help answer some questions you may have regarding your own SI behaviours(assuming you have questions about it. i do with my SI behaviours)
I really hope you're able to finish your paper without being triggered too much. it's great that you know your limits and that you know when you need to take a break from research.