Knowing your limits isn’t weakness. It’s having accurate information.

A limit you have measured is a fact you can plan around. A limit you refuse to look at still shapes everything, and does it without your knowledge. Pretending the ceiling is higher than it is does not raise it; it just means you keep walking into it and being surprised. Being accurate about yourself is a practical advantage.

Name one thing you have been overestimating: how late you can leave revision, how many shifts you can take, how little sleep you can run on. Set the number where it really is for two weeks, then plan on that figure.