You are currently RAC 43, and so you are travelling on this train. That is certain.
You are alone, so I think you can accept a night without sleep if necessary. But in the 6 days before you travel your position will improve.
When the chart is prepared your position will improve again.
If I was you I would be content.
That...
more... does not mean you will get a good nights sleep. Even confirmed does not guarantee a good nights sleep. But enjoy your journey.