can precum get you pregent

If he didn't bust inside of you, the chances of pregnancy are pretty slim. HOWEVER. There is precum, which in some cases can contain a small amount of sperm. Precum is a clear substance used to clean and lubricate the penis. The precum itself does not contain sperm, but it can pick up left over sperm. If the guy came recently there is a chance that there is some sperm left inside, and the precum could carry it out. This can lead to pregnancy in some cases, though it is rare. If he urinated since the last time he came, then the urine most likely carried out whatever sperm was left. It is much harder to get pregnant than most people seem to think. There are only three days a month when a woman can become pregnant, that is when she is ovulating. Ovulation occurs about half way through you're menstrual cycle (so normally around the 14th day, depending on how regular your period is). If you were not ovulating, the chances become much slimmer, even if he had cum inside of you. If he didn't, and it is just precum you are concerned with, the chances if you weren't ovulating are almost zero. There is always a chance of pregnancy with unprotected sex, so be smart. ALWAYS use a condom. Put one in your wallet, or your purse so that no matter what, you are never caught without one. I also suggest that if you are planning sex without a condom, get on the pill. If you go to a family planning clinic, sometimes you can even get it for free. Most places provide it free until you graduate from high school. No form of birth control is 100% effective. Condoms come off, and break. Trust me, I've had both happen. It came off recently, and I've been in panic ever since. It is always best to use two types of protection. I am not on the pill, and I know I should be.
So take all of this from someone who has had scares. Pregnancy is forever, so you should always protect yourself if you aren't ready for it, like it seems that you aren't.
But I have to say, even though I myself am sexually active, the best way to prevent pregnancy IS by not having sex at all. If you are not mature and responsible enough to understand that birth control should be used AT ALL TIMES, then you shouldn't even be considering having sex. I know guys always say they don't like condoms, but unless you are on the pill, one should be used. If a guy isn't responsible enough to understand that one is necessary, then you shouldn't have sex with them anyways. End of story.
I hope that everything goes alright. Good Luck.