Fair enough, I can understand that. And it sounds like you are on track to get onto a decent course.
So in terms of moving forward, I recommend that you undertake an audit of what time you have left for revision. You could get one of those giant laminated wall charts and plot out your exam deadlines, also block out your available revision slots. Then go to each A Level and draw up a list of the revision tasks that ideally you will undertake. You could do a spreadsheet recording all of this. The aim is to make sure that enough revision slots are allocated to each A level subject overall, and then within each subject that enough subjects are revised. I think you should start working on this straight away, this is realy an admin task, but an important one - once you have your masterplan , you can pick and choose what to work on as independent mini tasks, which might make it less onerous. Good Luck!