last month on 13 th april i had a protected sex with my boyfriend,he also ejaculated outside,for safety i have taken an emergency pill within 2 hours.it was a headache,vomitting for first few days as i know it was some side-effects of the pill.but throughout the month i suffered from some abdominal pain at lower left,i had my period 2 days after the due date,on 26 april for 3 days.in may,i had the pain for 1 or 2 days,i had my period also on 25th may for 2 days..is there anything to worry about in any concerned respect?