Somebody please give me a biology lesson

[JustPutSomeGlitterOnIt]

Ok so I have 3 children and have started on the injection to avoid having any more.
But I have a theory about being on the injection.
A terrible, troubling theory.

Here are my premises:

1. Menopause happens when I run out of eggs
2. I am fertile up until I run out of eggs
3. I run out of eggs by releasing most, and a few dying
4. I don't release eggs on the injection
5. Therefore I am just delaying my fertility, and I'm going to get to 50+ with all my little eggs nice and intact and be fertile up to like bloody eighty YEARS OLD!

Please somebody explain to me why I am wrong.

I'm 26 now, so I've got another entire LIFETIME in which to avoid a surprise.

Surely if I'm not releasing eggs, they're just sitting there until I come off the injection. And all of those years when normally you're releasing one a month and usually bleeding it out aren't going to happen. So my eggs will last far longer than if I were not on the injection. And menopause won't hit until I get rid of them all, which will only start to happen again once I come off the injection, which isn't going to be for DECADES.

No?

TIA

But I’m not sure that the egg quality would still be good enough at 50 or 55yo to lead to a pg even if the woman had taken the injection all her life.
It’s not just an issue with quantity but also quality