Understanding Non-Penetrative Sexual Activity & Aftercare

Question
Me and my boyfriend,  were in his room messing around,  and this was 2 days after my period..  (may 25) And. He started to finger me.. and I got wet eventually,  so he started too rub his penis on my underwear and he says he didn't cum.. he kept checking.. or pre cum.. so, he rubbed his penis on the outside of my vigina. ? And.. he didn't insert.  But I was very wet.. He only rubbed for maybe 5-10 seconds then stopped.. and he went back too fingering me.. I was wondering if I could get pregnant from this?  Im really scared and only a teenager ..  so.. please tell me everything I should know.. I need the breakdown.  Just too be reassured thank you SO much

Answer
As long as you keep your underwear between you and the sperm, you won't get pregnant.  Pre-cum usually doesn't have sperm, but it could.  Sperm on the outer vagina won't get you pregnant, but if your boyfriend fingers inside, he could carry sperm inside.  As long as his penis and his finger don't go inside your vagina, pregnancy is almost impossible.