I feel very similar to you, it's coming up to a year and a half for me. I feel like I've been driving for so long that once I smooth out on mistake, I pick up another, and it's pretty much a never-ending in cycle. My instructor said I can drive but I'm inconsistent, so one week I'm great and one week I suck. I think maybe just booking my test and having a lot of lessons in a short space of time is what might work best for people in our situation.