[tuckerpo]

Deadlines should always be a management problem. Missing deadlines ought to be a signal that there are inefficiencies somewhere - your requirements are unclear, goalposts are a little too fluid, etc.

It's really your job as a lead to objectively report status of things, and it's management's job to listen to what you have to say. It might be helpful to attempt to detach emotion when thinking about the upcoming deadline - instead of "oh shit, will I be fired? will I lose the respect of my peers?" - think more - "what can I personally do to mend this?"

You may come to the conclusion that deadlines are mostly out of your control - and especially, people's reactions to deadlines being missed is 100% out of your control, and should not be taking up any mental real estate. Is it really worth panicking, losing hair, gaining weight, being miserable stressing over the PM getting his 10% bonus for shipping on time?