A friend told me the other day that if you are on the pill and fall pregnant without knowing and keep taking the pill it will make you lose the baby without realising it. Is this true? I seem to remember reading somewhere that it won't hurt the baby. But am not quite sure. I would not want that to happen to me as I am on the pill and occasionally forget to take it therefore increasing the risk of falling pregnant. And another question. I know if you have a vomiting bub that reduces the effectiveness of the pill......what about diahorrea? Does that also affect the effectiveness? Thanks in advance to all who reply!!