Virgin Radio
Anyone that was listening to Virgin Radio last week may have heard us discussing an unusual event – a woman who gave birth but did not even know she was pregnant…on a plane!
http://www.emirates247.com/offbeat/crazy-world/woman-on-flight-didn-t-know-she-was-pregnant-2015-05-14-1.590723
It is surprisingly common for women to give birth without even realising they have been with child for the previous 9 months. Monthly cycles can still occur, you may not be someone overly affected by hormonal changes and you may not even show significantly around your middle.
So if you have had unprotected sex, the only way to be sure, is to be tested.