I take my contraceptive pill (Alesse) continuously. Even when I take my week off, my periods don't start, is this normal?

Yes, it is normal for your menstrual period not to occur during the week off when taking your contraceptive pill continuously. This is because the body understands that you do not want to conceive right away and does not produce a thick endometrium in the uterus, resulting in less blood to expel from the body. This will not affect your ability to conceive when you stop taking the pill for more than a week. It is recommended to continue taking the pill continuously unless you are trying to become pregnant. There is no need to stop every three months.