first of all this is not acceptable if you take i-pill frequently. as these pills are of high hormonal content it can mess up your internal hormonal balance. so you may have these types of few abnormal bleeding for the following few weeks. now the intermenstrual bleeding or spotting might be due to ovulation itself and does not warrant any treatment. i suggest you to start regular contraceptive pills from the first day of your next cycle onwards. it will help you not only for protection but also for regularization of cycle. for further information consult an obstetrician and gynaecologist online --> <link>
having spotting after emergency contraceptive pill. is there anything to worry?