If you had a protected intercourse why take I pill?? It's for emergency use to be taken once in a while.. All these are side effects of the hormones which the I pill contains.

You got your periods on 5 March (10 days before the period was due). That means you were expecting period on 15 March. You had taken i pill on  23 and 24 February.  You had bleeding 9 days after I pill. That was withdrawal bleeding due to i pill. So your cycle should be calculated from 5 March. Your Ovulation time should be around 19-20 March. You had spotting on 16 March. It almost fits into your cycle (but then your cycle will be 26-27 days instead of 30 days. You should expect your next period by 30-31 March. If you don't get your periods by then, please do urine pregnancy test and consult a Gynaecologist on Practo with all the details.

Side effect of pill

Bleeding post ipill is a side effect called withdrawal bleed It's not ur perids U need to understand that u can never be safe with any emergency pill Thy hv a high failure rate U can be pregnant despite one Thy are known to cause irregular vaginal bleeding delayed periods