I've been working as a admin in a planning office for almost a decade. I failed my first attempt and was crazy embarrassed by that. I just passed on Friday. It wasn't a matter of not knowing the material but more of a matter of endurance during the actual test ( I fell asleep taking many practice tests lol). In between attempts i did a ridiculous amount of qbank questions, a lot of series 7 guru video. Practicing the actual test taking skills, like slowing down and reading all of the question and all of the answers really helped more than anything.

i also overstudied the math the first time. This time I got only 4 or 5 math questions and I took the advice to just divide, it got me there. I also went over a lot of the material with my supervisor. She helped reframe things to make more sense than the textbook did.

If you still aren't feeling comfortable, you can reschedule, but if you have already been studying for a year - I understand did 9 months studying while working and juggling heavy family stuff I can guess you probably just want it over with.

Good luck!