I agree 100% with ChristineMP. You need to have a full workup done, including a full thyroid panel.
Many things can cause a late or missed period...pregnancy is only one of them. You should see your health care provider for some blood tests (not just hCG, but all your female hormones plus a full thyroid panel). The results will help your HCP determine the cause of your missing cycle and appropriate treatment.
it is better to go to ur doctor to get check out ,