hellllooo.......me and my g.f had unprotected sex on 25th of january but i didn't cum inside her and then within 3 hrs of sex she took i-pill for safety reason......and then in january she got her periods on time that is on 29th of january......then again on 15th febraury we had sex and this time also i didn't came inside her but for safety she took i-pill on 17th of febraury.....then on 22nd of febraury she had spotting which got over on 23rd of febraury.....and then on 25th of febraury she had her normal periods but of 3days duration(normally she use to have 5days)......and then on 12th march she again noticed some spotting which got over on 13th of march.....and then on 17th she noticed again some spotting which got over on 19th of march......her march period is due on 25th but she got it after 3days delay that is on 28th but the bleeding is heavy compare to her normal cycle with some clots......and she also having severe pain in thighs,lower back and lower abdomen........we did 3 home pregnancy test and all came negative.......so please guide us what cold be the reason of this severe pain and heavy bleeding with clots......please help....!!!!