How soon after unprotected sex do you start to experience symptoms of pregnancy??!! This morning My partner didn’t pull out in time so he ejaculated into me (only some of it but still)

And what are the symptoms to look out for? (Other than missing your period)

We don’t have the money for morning after pill, so I wanna look out for the signs.

Thanks in advance xx

EDIT: we can’t borrow money off anyone we don’t have/know anyone here