If your period is late and you're experiencing symptoms like severe vomiting, headaches, leg pain, and a slight temperature, it's possible that you could be pregnant. These symptoms can sometimes indicate early pregnancy. Taking a pregnancy test is the best way to confirm whether or not you are pregnant. It's important to follow your doctor's advice and take the test as soon as possible. If the test comes back positive, make an appointment with your healthcare provider for further evaluation and guidance on next steps. If the test is negative but your symptoms persist or worsen, it's recommended to consult with your doctor to determine the underlying cause of these symptoms.