For the first time after using bc for about a year i have light period on 9th days of using my new pill and i am totally sad. i don't know the reason why it might happen. i am vegetarian and i don't eat fish either. i just started having b complex on my diet. but i was trying to loose some weight too so recently I wasn't really careful by my eating, i didn't eat much and i exercised too. but i actually feeling having some blow in my stomach and i just don't know why all this happened. i am not sexually active person, and i used to have a some long periods but it got perfect by using the pills.