Chances of being pregnant...

did you have sex?
you said you got too nervous and changed your mind..so what that tells me is that you did not have sex.
...so why did you take plan b?

plan b is basically hormones like birth control pills, but plan b is taken within the 72hour mark from when you had sex to stop a pregnancy from happening.
the amount of hormones in the pill could be a reason why you have not gotten a period yet.

but again, if you did not have sex, no pregnancy would have occured in order for you to have taken plan b, therefore no your not pregnant and no you do not need to take a test.

if you had sex without a condom, there is always the possibility of pregnancy, and the only way plan b would have failed is if it was not taken within 72hours.
From the sounds of it, you didnt have sex and no your not pregnant.

go see your doctor and maybe consider getting on birth control if you are considering having sex with your boyfriend and are worried about getting pregnant.

??? still no reply..