Firstly chill, you are in year 10 doing badly in your mocks needs to be sorted but it isn’t a full on crisis. Also plans almost never work - it is great to have o r to keep you on track but don’t sweat if you stray from it. Finally when you get your mocks back identify what you did badly on a focus on that to start with and make sure you are understanding and consolidating new content that gets taught. That’s what I try to do although I am not great a consolidating new topics
Hope this helps