Why did I experience virginial bleeding after taking emergency contraceptive?

It is impossible to diagnose your pregnancy under the circumstances without a pregnancy test and a checkup. A gynaecologist specialises in women's reproductive health and can provide the proper medical advice and treatment.
 

Taking abortion pills can make you bleed a little but it is usual to have some bleeding. If the bleeding goes away quickly and you have only a small amount of bleeding after, it can mean that the abortion is done. Just chill out and see how you feel. If you have intense pain, fever, or heavy bleeding, go to the nearest hospital without delay. 

Blighted ovum, which is also called the synonym "anembryonic pregnancy," is a situation where a fertilized egg is implanted in the uterus, but the embryo does not develop. I understand your worries about having two blighted ovums one after the other were scary. The most important thing is to consult your doctor, who knows the potential causes and comes up with the possible solutions that allow you to have a healthy pregnancy in the future. You could have further examinations which are done to help decide if there is an underlying factor that is causing this to happen multiple times. 

A faint line may mean you are pregnant, but it could also be due to various factors such as the test's sensitivity, the timing of the test, or evaporation lines. For a more accurate result, you can repeat the test using the first urine of the morning, as it is usually more concentrated.

Taking an emergency contraceptive pill (like the i-pill) within a day or two after intercourse may reduce the chances of pregnancy, but it's not a guarantee. If you're concerned about pregnancy, take a home pregnancy test around the time of your expected period.

Recurrent yeast infections are common and it occurs due to a variety of reasons such as a weak immune system, other health conditions, or an incomplete treatment of the initial infection. Get a proper diagnosis and practice good hygiene.