Ob-Gyn questions? Ask a gynecologist online.
Can you tell me more about it? How tall are you? How much do you weigh? Any weight change? Can you tell me more about it? Any odor? Pain or itch? When did it start? Is it consistent? Is it getting worse? Any other symptoms? Abdominal pain? How long dose the period last? Are you aware of anything which might have triggered it? Any medical problems? Any surgeries? Any medications including over-the-counter pills and herbs? Any family medical history?
You should see a gynecologist to have ultrasound to see if the lining of the uterus is thick or not and there is an ovarian tumor. If the lining is thick, you should have an endometrial biopsy to see if you have endometrial hyperplasia or endometrial tumor.
I don't think headache is related. If it is miscarriage, it is possible. You should have a home pregnancy test if there is a possibility.