Stuck at 50% after a year of Step 1 prep

I started my Step 1 prep over a year ago (With some interruptions)

My baseline NBME 26 was 20%.

At first, I used First Aid and UWorld. I didn’t retain much from FA, I did UWorld random almost twice (A lot of questions but didn’t review them properly-big mistake)

After that my NBMEs didn’t improve enough so I watched almost all Boards & Beyond system videos. After that, again, NBMEs didn’t improve enough so I started working with a tutor, which really helped me understand concepts better.

My last NBMEs this week: 50%.

My exam is in 5 weeks, and I’m desperate to finally move forward. I’m thinking of using the Mehlman PDFs.

What do you think? Has anyone been in a similar situation and improved?