How can you know if you pregnant?

I think im pregnant...but im only 13 and I dont wanna take a pregancy test just yet

If you are pregnant/possibly pregnant, you need to step up to the plate and be responsible! You need to tell your parents, (assuming you live with them) even if you are afraid they will 'kill you'. Do you realize that if you don't get medical help you and/or the baby have lives at stake? Take a pregnancy test, and if you can, I'd VERY MUCH recommend seeking a doctor as soon as possible. I think dying outweighs punishment any day.

Magic 8 ball
Psychic reading
A rabbit (inject urine into rabbit, then cut open and examine ovaries, dont know if this is legal any more)

Other than that, time to grow up and face reality.

well the only way to be sure is to take a test, the main thing is how late are you on your missed period? sometimes when you are just entering into puberty your periods can be irregular and also stress will halt them from happening, also did you and your partner use protection?

gosh you are veryyy young! you havent even devolped yet! gees you need to goto the doctor to see

if you had sex your probably pregnant
waiting or hoping your not wont make you any less pregnant if you are
so its time to face the consequences of your actions and get one
to find out if your pregnant take a pregnancy test 2-3 weeks after you had sex
(any sooner and the results won’t be accurate)
in the morning with your first pee is the best time
and take it when your period is due
alternatively, see a doctor for a blood test
this will both let you find out quicker and give you more accurate results
and remember to LEARN about sex before you go off having it
learn about as well as a male and female reproductive system
birth control, contraception, pregnancy and sti/stds
don’t have sex until you know the consequences involved with it
because the main reason why kids and teens get pregnant and/or get stds
is because of a lack of sex education