Hello
1. As you have missed your periods and thus there are two possibilities As either you are
pregnant or your cycle has been disturbed.
For confirmation of pregnancy, you should have to check once after 4-5 days with urine pregnancy kit or at pathology laboratory.
and if its negative, i like to advise you nothing to worry and not to do anything, only have to wait and watch for more 15 days with relaxed mind.
Next Steps
after waiting of 15 days you can consult gynecologist and scan with sonography as what is wrong with your uterus function?