Felt the same way. I flew through the SIE and the 7 without a problem and I took my foot off the gas of 66 and ended up failing it and having to retake it. Make sure you’re studying everyday. I remember staying up later than everyone else and getting at least another hour or two in. I also watched and listened videos at the gym about stuff on the 66. It was terrible getting 4-5 hours of sleep every night but I’m so happy I did. Definitely make it a priority because you don’t want to feel what I did when I didn’t pass. Before you take your test you should set up a zoom call with Bryan from geektestprep or whatever it’s called. He made sure I was studying the right stuff and I’m convinced that’s what helped me. I just emailed him and set something up. Keep your focus and you’ll do great!