Hi there,
Just to clear up a few things for you:
- There is always a risk of pregnancy if you let semen get into or near your vagina.
- The greatest risk of pregnancy comes from unprotected intercourse ending in him cumming inside you, but there is sperm in the 'pre-cum' which is present on a man's erect penis, and in the liquid that he ejaculates so it is very important that if you let his penis anywhere near you in future you should be using protection, and you should not put cummy fingers inside you as this does present a risk of pregnancy.
However it is true that sperm cannot live for long outside the body, so the chances of pregnancy are much lower than if you had actually had intercourse. Some people are more fertile than others, and the risk is there no matter how small. So in future you should take this as a learning experience and be much more careful!
Try not to panic, as this can delay your period further. My advice would be to wait until you are late (if this happens) on your period and then take a test or visit your GP.
Another thing you must consider is the possibility of STIs or STDs - this is a very real risk as his semen was put into your body with no protection. The only way to avoid the risk of sexually transmitted nasties is to use a condom when having sex and to not exchange bodily fluids in any other ways, either! You should discuss this with your dr and get tested as a lot of infections don't have symptoms and many people don't know that they have them, even though they can cause serious health problems if left untreated - If you get diagnosed and treated quickly you should be fine, though!
Take care in future, sweetie, and if you have any other worries feel free to pm me your questions.