Welcome to HCM.
You have not mentioned when your previous menses was. If before this period you had missed your period for a month or more, the possibility of threatened abortion
or complete / incomplete abortion
has to be thought of.
Best is to consult a gynecologist, get a serum / urine pregnancy
test done, if there is a possibility that you could be pregnant and get an ultrasound
study done to find out the cause for this weird period.