If you become stressed over this, your period might even be late due to stress. If your partner does ejaculate, sperm can only live a very short time outside of your body. But, if his penis was inside your vagina at any time, then you could get pregnant. It detects your hormone levels and can tell you if you are pregnant. If your partner ejaculates onto your underwear, do not wipe yourself. What do I do if I might be pregnant? What do I do if I think I might be pregnant?
We've told you the "textbook" version of how most women's bodies work, not everyone's.
Could I Be Pregnant?
Is there anything I can do about it now? So the only way to really know if you are pregnant is to get a pregnancy test. However, women's cycle's can be different! If you become stressed over this, your period might even be late due to stress. Sperm needs to be deposited either in the vagina or somewhere very close to the entrance of the vagina.