If you have significant anxiety, theres no shame in reaching out!
But to address studying...
That style of studying is very similar to mine. I studied most of anatomy with a scratch notebook and set a timer for 15-20 minutes at a time to try to basically recreate my syllabus, notes, drawings or w/e from memory. Then would set another timer, ~30 minutes, to correct what I just did. It worked really well for me.
I like quantifiables when I think about making a change to a study habit. And quantifying the effectiveness of a study technique is not really possible. If you equate this to athletic training, study techniques equate to training selection/exercise selection. And when you compare similarly effective exercises or training techniques, adherence is by far the most important trait when considering effectiveness of a technique. So... IMO, if you like the way you study, if it isn't miserable and you are reasonably productive, the first thing I would address would be quantifiable markers, not the study technique. So IMO, if you are truly quizzing yourself, I think that's a great technique. But there's a lot of other questions to ask yourself....
the most straightforward thing to modify is the amount of time you're studying and the number of repetitions you are doing of the material. If you were an athlete training for a sport, this would equate to training VOLUME. In the world of athletics (and I think academics) volume is king, not exercise/training selection. Questions you can ask yourself: How many hours of good focused study are you doing a day? Can you increase it? Do you need to increase it? How many times do you review each lecture before a quiz? once or twice? Maybe try making a list of all the lectures on each quiz and review each lecture 3-4 or even 5 times or more (over a period of days). If you use practice questions like Kaplan or Amboss or Rx, how many of those are you doing? Can you do more, review them more? I think Anki is effective because volume is built in. I'm not totally sold on the Anki algorithm of spaced repetition because you can totally adjust the scheduling however you want. As long as you train (study) at a high volume with sustainable but high intensity for a significant period of time, you will improve.
That means more hours studied, less distractions, more self-quizzes, more tables drawn from memory, more active recall.
Last two things:
Active is better than passive. Watching B&B does not equal trying to rewrite the important points of your notes from memory.
Volume doesn't increase over night. And it can't be an always high thing. Just like an athlete, you have to gradually increase intensity or duration. And you'll need time to recover.
But maybe you're maxed out already at like 9-12hrs of focused study. Well, your better than I am in that regard then. (I'm procrastinating right now!) then it would be time to try new study habits. I really don't think this is the case tho tbh. I've taught/tutored a couple hundred students off and on for around 5 years, and the common denominator for every student that does well has been high volume. (Also, I'm not saying you need to be studying for 9-12 hours a day. My argument is that if you aren't scoring where you want to be scoring, increase volume until you are scoring what you want. Find the minimal effective volume and utilize it.)
Hope that wasn't a waste of time to read. lol.
TLDR: Find the way that you love to study and that is reasonably effective, and own the **** out of it. Challenge yourself to study with more focus, intensity and for longer durations. Increase quantifiable metrics related to your study habits (like time spent and number of passes/repetitions). The same way an athlete trains.
