I'm Newly Married Man.my Penis Inserted Into My Wife Vagina

I'm newly married man.my Penis inserted into my wife vagina just to check which hole and 2,3 seconds it was there.I tried to insert more closer.she said as paining.so i withdrew it.no sperms came.it was not came on that time.but, my doubt is (few hours before i masturbated and sperms came.i wiped so cleanly.after a hours only i inserted into hers.sperms alive till that inside of my penis?Is it any avilable for pregnancy? we don't plan for that now.she is worrying.