Late PMS?

There are many reasons you can miss your period, changes in your eating habits, changes in the intensity of your workouts, stress (mental or physical), and pregnancy. If its been under 14 days since your period was do, then you have a late period, greater time than that and you may want to consider the possibility that you are pregnant.

I missed mine for at least 3 months and it was just down to eating and drinking habits changing.
e.g. no proper meals
lots of alcohol
snack food
etc.

Sorry, it wouldn't let me add more comments, but this is still in response to your comment to my answer.

If you can drive, then think of some reason you need to go to a pharmacy to pick something up and you can buy one there. They are fairly inexpensive and a lot of pharmacies list the price online, I know Walgreens.com does. If you can't drive there yourself, then I think it would be a really good idea to confide in a friend and get them to take you. You can just say you are getting lunch with your friend and then go by the pharmacy while you are out or something. Maybe even take the test at your friend's house so there will be no evidence at yours. You can do it in any bathroom really, and having someone to talk to when you get your result will be comforting.

You don't need anything special to buy a test, and you are over 18 anyway (according to your age up there) so there shouldn't be anything to be afraid of there. Just play it cool, I know it can be embarrassing to buy that sort of thing. If you are within walking distance of a pharmacy (or a grocery store, they usually have tests too) then you could walk there and get one.

Just do it soon, whether you are pregnant or ill, you are losing a lot of time waiting and it's not good to have to worry. Good luck, let me know if you have more questions!

Your local pharmacy has plenty of off the shelf test kits to answer your question very quickly!

If you've missed a period and have been sexually active, I would say get a pregnancy test, even if you had used protection. As protection can fail and you can never be too safe. Don't worry yourself though, worrying doesn't do anything positive to help you.

If you are on the pill, then it's possibly from the birth control. If not, then I would probably be worried. How late are you? If you are only a day or two late, wait a few more and then take a pregnancy test. First Response is a brand that is supposed to be more accurate earlier than most brands.