If you have missed your period for over a week and are experiencing symptoms like cramps, breast pain, and pain around the armpit, it is advisable to take a pregnancy test. These symptoms can be indicative of pregnancy, but they can also be caused by other factors such as hormonal changes or an underlying medical condition. Taking a pregnancy test will help provide clarity on whether you are pregnant or not. It is recommended to use an early detection test for accurate results. If the test is negative and your symptoms persist or worsen, it is important to consult with a healthcare professional to determine the underlying cause of your symptoms. They can provide further guidance and recommend any necessary tests or treatments based on your specific situation.