Its a possibility, though a low one seeing as you took plan b within the correct amount of time. Plan b is like a triple dose of birth control, so you might feel nauseus and emotional and strange.
Why don't you take a couple pregnancy tests and see. Hopefully you're not but if so make sure you go to the drs, that's important. Good luck! And try to be more careful next time (:
hello..
For first time did he pulled out?? if no,then there will be high chances of pregnancy..as u were in your fertile days...
and if u had just started doing sex then that can be a cause of your late periods ..may be not sure...
To be on the safe side take a pregnancy test and stop worrying..!!