Hello Sir Today I Fingered My Gf Before Tht I

Hello sir
Today i fingered my gf
Before tht i had touched my finger with my precum
I didnt ejaculate
I fingered her after touching my precum
But only a lil bit was touched
Shes scared she might get pregnant
Pls tell us wt to do
If there are chances of pregnancy
How can we stop it without going to a doctor