Hello and thanks for your query.
I shall make an effort to provide you with good professional recommendations specific to your questions.
Based on the information provided it is difficult to say whether she is pregnant or not.
As a drop of pre ejaculate is enough to make pregnant, hence I advice you to consider one or the other method of
contraception if you don't want to get pregnant. It is better to be cautious.
As you have mentioned that, you have pulled out, there are chances of pre ejaculations, that may occur.
One of the earliest and simplest way to know that you are pregnant or not, is by using, urine
pregnancy test.
It's best to do the home pregnancy test first thing in the morning, when your urine is most concentrated and
hCG levels are highest.
So I advice you to perform a test a week after missed period and with morning sample of urine. This test kits are nearly 98% accurate, so reliable.
Yet again, I duly appreciate your query to me, I do hope that you have found something useful to help you and I shall be glad to answer any further apprehensions.
Sincerely,