Can the use of an emergency pill twice in a month few months back cause mensural period delay and also light flow after few months of usage?

Medication with hormones can drastically change your cycle after frequent use but your cycle should be normalized after 2-3 cycles.

Emergency contraception can cause menstrual abnormalities for a short period of time (1-2 months) after taking it. It contains a high level of hormones that interfere with ovulation and the implantation of a fertilized embryo. It should not be used regularly as the levonorgestrel can have side effects including nausea, abdominal pain, fatigue, headache, irregular bleeding, breast pain