No, as long as you are positive you were protected you are fine. Your period has the tendency to flucuate the way it wants. A period can last anywhere from 2-10 days..normally.
I'm not sure what you mean by " half way protected" but going by your wording your there is a 50% shot that you will and it don't matter if your on your period or expecting it ...
If you take the BCP everyday as directed you are 99.5% protected from pregnancy.
If you had 'protected' sex then it is very unlikely to be pregnant if you used contraception. But if you had 'unprotected' sex obviously your risk goes up but is very low because your period is starting meaning that the lining of the womb is breaking up causing a period. But if you don't get your period you should consider taking a pregnancy test.
Well it depends when she started her period and when she ovulated. If she had finished her period is week before you had sex then yes it is very possible she coudl be pregnant.
can i get pregnant 2 days before my period starts
If you have a period than you are not pregnant
Most people have a last period before they are pregnant. Some even have a period while they are pregnant.
No. You can get pregnant in the week(s) before your first period.
No
it means your pregnant
It is probably just the symptoms you get before a period. If your period doesn't come, take a test
You did not get a period while you were pregnant.