Pregnant and postpartum questions

1. When did you notice you were pregnant?

Since it can take some time for women to even have their periods, and usually you ovulate sooner and are more fertile, Im kinda confused as to when i should be on the look out for "pregnancy signs"..

2.Does it take the same amount of time (6-12dpo) for implantation, even if you're just fertile and unsure as to when you ovulated?

3.Did you have the same pregnancy symptoms?

4. How many months/weeks pp were you when you got pregnant?