Maybe you should take a small break and analyze what exactly is going wrong. There is no damage to that, if not just improvements.
I have had a severe (a real) burnout last year, I'm still fighting it, so I think I can speak up with quite some experience about this topic.
Two years ago I was trying very hard to finish my exams (13 of them), I knew I was going to fail a couple of them but I did everything I could to save it... guess what, I failed.
As soon as I failed I went on and on studying and exceeding myself, pushing myself waaayyy off my body's limits. By the end of February I was so exhausted I didn't know what was wrong with me, I couldn't remember things anymore, couldn't perform at all, always very stressed, started lacking at any tasks, I lacked of sleep, wouldn't concentrate anymore, would feel always tired, would feel like my head would explode after studying/making exams (in fact so bad that I would really get sick from it), huge headaches, exercises that I was able to do I couldn't do any more, etc. A total disaster... that obviously triggered panic and a big question "what's wrong with me?". At the end, nothing was wrong, just that my brain said a big "STOP" and "screw you". I was abusing of myself.
I finally went to the doctor and the doctor literally said me: "if you don't stop now, you will either get a heart attack or develop a depression over time"
I needed rest, and slowly recover, let the stress go away and bit by bit come back to my activities.
What I want to teach you here is this:
Pushing yourself is good. BUT, exceeding your physical/mental abilities can kill you, do it long enough and it will. I don't know your full situation, but here is what I learned and what my doctors/mentors have recommended me over time:
If you feel you can't go forward in any situation, take a break. 10 minutes? 1 hour ? a day? a week? a month? a year? you choose it. Let your body indicate you.
Refresh your mind with new things. Improvement comes slow, some of us go faster in some topics/exercises, others go slower, it's completely normal.
As you take the break, sit down and evaluate yourself:
- What exactly are you struggling with?
- What specific part of the issue do you find difficult/struggle?
- what you don't like of it?
After you have done that, put it on paper. Now you have a good overview, start making some research online and find the best exercises that suit your problem. Start working on them, one by one. Do not start working on them all at the same time as it will confuse your brain. Start one by one, add them as you go and feel more comfortable.
most important: DO NOT TAKE ANY PILLS/DRINKS or wathever BS they say you. (own experience), as the problem doesn't get solved, it can potentially create an addiction and only worsen the situation. Get your fingers off from redbull or similar on this case. Believe me.
I now take breaks regularly, just because I want to take care of my progress and I need to, for my recovering health. I have done tons of progress with my damaged brain. I don't wish you the same, believe me. I don't think you are in such a bad condition as I was, but prevent it.