Well, I have had sex on the 5th of December and then again on the 21st of December and we have used condom at all the times. After I checked if it did not brake and it did not, all the come was in the condom so I was sure that I could not get pregnant. I was meant to get my period on the 25th Dec but I got it straight on the 21st December however it was a very light flow and the period lasted for about 5 days but with a very light flow. At the beginning of December I was on a diet, but just normal diet, and I have lost 3 kilograms. Do you think this has affected my period? Or, How could I be pregnant if I have had a protected sex ?

Losing 3 kg (6.6 pounds) should not be significant enough to alter your menstrual flow.

Sometimes mother nature throws us ladies a curve ball. Gives us a period that is earlier or later than usual... lighter or heavier than usual... sometimes even missed periods... for no reason whatsoever.

If you had a period, if you bled, chances are you are not pregnant. However, you should remember that the only form of birth control that is 100% effective is abstinence. You will now need to wait to see if your next period comes. But chances are you just had one of those wacky periods we get every once in a while.