If you have another airfield with a flight school within reasonable distance, I would go and have a chat and possibly book an hour with them to see how you get on. Nothing lost other than the cost of the lesson, and you may just find that a change of scenery and instructor provides a breakthrough. I went to 3 schools at 2 airfields until I found somewhere I was really comfortable.
Everyone is different but I found the relationship with my instructor was more important than anything else, and this gave me the confidence to get through the difficult periods of the syllabus which we all go through.
Good luck and let us know how you get on.