Thank you for getting in touch with us. As I see, you have been waiting for your menstrual cycle for the last 15 days. Urine pregnancy
tests are usually positive 8-10 days after fertilization. However, in your case, they continue to be negative. However if the mentioned symptoms continue, we would recommend you to get in touch with your Doctor and get an Ultrasound
done to find out the exact cause. Pregnancy is not the only reason for the mentioned symptoms. Therefore, few tests would have to be performed to find out the exact cause behind your problems. Hope this helped.
Dr. Gagandeep Dhillon