Hello,
I have gone through the query and understood your concern. Use of excessive emergency pills leads to hormone imbalances as the pills contain high progestogen dose. Hence, their use should be restricted to only once or twice per year. In the current scenario, you can go for the estimation of the serum beta-hCG titres to exclude/confirm pregnancy and a trans-vaginal sonogram to know the status of the pelvic organs. If pregnancy is excluded, hormone imbalance is the most likely cause for the delayed period and treated accordingly. Please see a specialist in person for further management. Take care.