even if he did not come in you there is precum, and yes pre *** can get you pregnant, the morning after pill does have negative effects on your body and taking them more than once a month can have an effect on your reproductive system when you do decide to try for children, with that said, you said you got your period after having sex (and yes it is sex because he was in you even if it was for 10 seconds, you can no longer call youself a virgin nor say you dont have sex because foreplay is also a part of it) then you are most likely not pregnant, both the morning after pill and intercourse can change the way your body acts, it can throw your periods off track therefore causing you to be late, now if you are not looking for a pregnancy you MUST get on some kind of birth control, and NO the morning after pill is not a form of this... also your boyfriend needs to be responsible enough to wear a condom, and like you said you are both still scared, so dont rush yourselves to do something you dont want to and can bring you a lot of consequences. Also, pregnancy tests are more accurate AFTER you have missed your period, NOT BEFORE, take it with first morning urine after you have missed your period.
Good Luck.
hey i dont think you are pregnant it takes sperm inside of you to become pregnant. i doubt in ten seconds he came inside of you. but you said you took the morning after pill that may have had an effect on your body. if he does not come inside of you do not take a pill you do not need. stress can affect your body also. i personally think you need to see a doctor and explain to him/her that you took the morning after pill. like i said it may cause a late period because that pill is killing the egg and sperm in you but no sperm was in you so the pill may be affecting your wall in your vigina. and if u still think you are a test is better in the morning about 2 days before your missed period hope i helped