I was worried since I took unwanted 72 tablet and when to search on google about it and I find out that most of it it says ipill is more effective in preventing pregnancy than unwanted 72 tablet is it true because I look at the ingredient on both the table it seems that in ipill there is another ingredient that isEthinylestradiol while on the other hand it is not present in unwanted 72 should I be worried after an unprotected intercourse i took the unwanted 72 tablet with in two hours and I haven't got any kind of withdrawal bleeding is it because of the tablet please explain the difference because my last period date was on the 6th of August and I took unwanted 72 tablet on the 16th of August and now it's the 22nd of August no kind of bleeding yet I am so tense and scared about it