Of course! All it takes is one drop of semen and after one week you've got a lot more then that.
no
Just have unprotected sex.
No clue as to what your questioning is asking,yeah you can have sex and be pregnant in a week,that means your a week pregnant.
NO.
It depends on when the one night stand was. If it was a week before you got pregnant, then yes, it probably is from the one night stand. If you had sex after the one night stand, then it could be the other time you had sex
You can find out you are pregnant 14 days after you had sex.
after you have sex there is always a chance you can be pregnant take a pregnancy test or visit your doctor
Most definitely yes.
You can get pregnant a week before your period, the week of your period, and the week after your period, and some pregnancy tests are faulty.
If you did not go back on the pill immediately after your period ended, then yes you could be pregnant.
Absolutely!! Congratulations!!
It is very unlikely, however any time you have unprotected sex there is a chance of becoming pregnant.