Hi,
You may not get a positive HPT on the day of your missed period. You need to wait for at least 3 days after the missed period to get a result. The symptoms you have may indicate an early
pregnancy. Please repeat the test now as you are already lat by 2 weeks and if needed, get a blood pregnancy test followed by a trans-vaginal sonogram. Please contact your health care provider for further support. Wish you good luck.