Human body is very expensive, and different people have different load limits.
Therefore, fitness should also be gradual. Overload will leave a dark wound on the body, and there will be various hidden diseases when you are old.
When you feel tired, the best way is to rest, and it's not too late to go to the gym when your body recovers.
The body is like a spring. You're already nervous. If you toss it, it will only break if it exceeds its load.