Before giving you a piece of advice, I would like to point out that getting stuck isn't always bad.
- Sometimes it can be a sign that means you need some break.
If you're preparing without proper resting, it can be stressful and you may find yourself out of resources. Take a break, do some physical activity, let yourself have a couple of days longer sleep.
- Another reason could be the lost focus.
When you're too overthinking the problem, you become less confident and get distracted by unimportant things instead of concentrating on the key points.
- Could it be that you're missing out on something?
Considering you've spent 4 hours with a coach, it seems really odd to me that you didn't improve. Try to access the situation objectively: Why were these sessions not helpful? Maybe you need to have a try with one of the top coaches here?
You see, the reasons can be quite different, so I would recommend you have this weekend off, refresh, and get back on track.
Do you need any further help?