Pregnancy and missing pills?

You may want to take into account that your period maybe late due to missing pills not because you might be pregnant. But since you have had unprotected there is a possibility of pregnancy. But I would try not to stress about it. You should go ahead and take the test just to either confirm or exclude the fact that your periods are missed up because you are pregnant. The headache and the stomach ache could be from something you ate and it did not agree with your stomach. If you are overly concerned just make an appointment to get a checkup just to be on the safe side. They can draw blood, which is more accurate than a home pregnancy test, to see whether or not you are pregnant and help you come up with a reason why you are having the issues you are having.