I-pill is not 100% effective and has side effects involving changes in menstrual cycles. I-pill often causes delayed periods as a side effect. I would advise seeking the opinion of a gynecologist for consultation and evaluation to exclude other latent conditions.

No it is not normal. This is called galactorrhea and is due to a variety of causes such as hormonal imbalances, side effects of medications or other specific medical conditions. It is recommended to visit a endocrinologist to get the correct treatment and diagnosis.

It is quite usual for a girl to have a hard time sleeping during her period. One of the major factors behind this is hormonal changes. During menstruation, your body releases more prostaglandins, which can lead to cramps and affect your sleep patterns. You can also have problems sleeping because of the feeling of fullness, irritation, and anxiety. To feel better, one may try drinking calming tea, applying a heating pad, and relaxing around bedtime.

Having period irregularities after pregnancy is a usual occurrence. Your body requires time to get back into its normal function. Unprotected sex may lead to pregnancy. The earliest symptoms may be a failure to get a period, nausea, and oversight of the usual activities. To ascertain the truth of the situation, use a home pregnancy test. 

Abdominal pain and light bleeding are a common side effect of the medicine you took. At times, the bleeding may differ from person to person, so if it is not heavy that is fine. Just rest and keep yourself hydrated. If the bleeding stops entirely or you feel severe pain then seek medical help.