If you're still worried, get her a pregnancy test. They sell them at the dollar store, or any drug store.
There are women who still bleed during pregnancy, and it looks like a period to them, but it's rare.
She got her period 3 days ago, but today she messaged me and said that her aunt only found out she was pregnant at 5 months and she still had her period every month.... Am I safe or not? Because I only fingered her with possible precum and she already got a period afterwards
The chance is vanishingly small. First sex may upset her hormones and cause signs.
This is a good moment to learn that the egg drops 14 days before her next period and is only good for a day or two. On the other end sperm can lie in wait for five plus days waiting to pounce. If she learns her “signs of ovulation” she can pin down the day even closer.
A woman is most sexually receptive at ovulation time, which is how some girls get pregnant at first sex.
People do not get pregnant in this manner. Really need to insert a penis into her vagina for pregnancy. fingering will not get a girl pregnant.