Hey! If it's possible and you really want to retake them I'm sure it could be worth it, but if history and re aren't subjects that will help you out in the future, then it could just be worth focusing on the subjects you do now! You could think of your experience with being lazy as encouragement to work harder with what you're doing now and in the future. Just remember to be resilient and that you are good enough!I'm supposed to be doing my GCSE's this year, but now they're using our mocks too but I didn't try very hard which is what I regret as well. That's why I'm going to work harder in the future.Good luck!