No, this is not how it works.

You are 21, your clock is not ticking. You have an idealized image of motherhood where the baby gives you unconditional love, well guess what, that's not the baby's job and you are supposed to provide it with unconditional love. You are supposed to take care of the baby's needs, not vice versa, everything else is damaging to the child.

And I promise you, once the baby cries inconsolably or starts to learn the word no, you won't feel unconditionally loved anymore, and then you will be stuck with the responsibility for another human being while you can't even take care of yourself yet and that will make you even more desperate as it slowly dawns on you that there is no way out of this for the next 18 years.

This is a really bad idea. I hope you are not pregnant. And I hope if you are not that you will go and get an IUD instead of taking the pill.