I take them everyday- and I started taking them 2 moths before beginning ttc, so I've been on them for quite a while! I know how you feel about getting frustrated and thinking they're a waste of time and money once af arrives. But there is so much research to show that what a woman does with her body in the two months before getting pregnant can make a difference! I suggest taking them every day if you can, but it might be a question for your doctor.