Actually I'm singaporean.Are you British??!!!
I completely can relate to you... I think you’re either from Wales or Ireland because I’m currently doing A Levels (England) and in 2017 when I was preparing for my GCSE’s, I had the same problem as you. I was watching them day and night and I was so obsessed with them. I used to watch hour long videos and all the run episodes straight after school.... I stopped being a fan before my exams and thank goodness I got the grades I needed because my obsession wouldn’t have just affected my studies but also my mental health... my relationship with God was at its lowest when I was a BTS fan. Similar to you I also was an American/Artist fan... I liked Adele/One Direction/Demi Lovato and I would have never thought I’d like BTS or ever get into them.
Just know you’re not alone!!! A lot of people here have similar stories! Welcome