QuestionI just had sex and I stuck my penis in her for like not even a minute and I'm afraid some cum got in her like a little drip -- like just a little tiny bit. Is she pregnant?
If pregnancy was truly a concern of yours, you would not be putting your penis in a woman at all. All forms of sex, including oral sex, contain some risk of pregnancy. Since you fear pregnancy, then I must assume that you are not married to this woman, so you have been committing fornication and hoping to avoid the consequence of this sin. "Marriage is honorable among all, and the bed undefiled; but fornicators and adulterers God will judge" (Hebrews 13:4). See "Why Sex Outside of Marriage is Wrong" for more details.
What it appears you were attempting to do is the withdrawal method of contraception. The man has sex with the woman but attempts to pull his penis out before he ejaculates. To give you the possibility, let me explain that every act of sex does not necessarily lead to a pregnancy. If 100 married couples have sex regularly for a year, then at the end of the year 85 of them will have conceived a child. Even when the withdrawal method is done correctly, a 100 couples using it for a year will see 19 of them conceiving a child within a year.
The reasons it is not zero is simple. As a man gets close to orgasm, his muscles tense, making it difficult to withdraw. Plus there is the temptation to continue as long as possible, which means eventually the man cuts the time too close -- as it appears you did. But there is another factor most forget, it only takes one sperm being in the right place to cause pregnancy and your pre-ejaculate fluid can contain sperm. It isn't a great amount, but it only takes one. Thus, as soon as your penis entered her vagina, the possibility of pregnancy became real.
Yet, it amazes me in this age of so much medical knowledge, that people never stop to consider that pregnancy is just one consequence of fornication. Disease is easily passed on during sex and some sexually transmitted diseases are not curable, despite all our technology. A person who is willing to have sex outside of marriage rarely restricts themselves to just one partner. It is highly likely that the woman in whom you placed your penis had other men in her as well. Thus you've exposed yourself to all the diseases she, the other men, and their other partners had picked up.
And all of that for less than a minute's pleasure. You sell your life and health cheaply.