I am driving myself insane

I had a final round interview the other day and the director let me know i was the last candidate interview. He would meet with the other people i interviewed with in the other rounds and I should know the decision by Monday. I really want this position everything about it is ideal to me. And i can say im actually very confident about how every round went. Im just stressing myself bc regardless of how well i feel like it was i am also anticipating disappointment. I’ve been on the job hunt for about 8 months and it’s so exhausting. Every interview i have i make it to the final round just to be told another candidate was chosen. It’s such a weird contradicting feeling bc im genuinely confident with how the interview went but i also just can’t help but worry about the potential let down. Im really trying to be patient and positive.