2 weeks late.. irregular period with reddish brown spotting for about a week. no cramps, but had a headache on and off for 2 days?

Periods, spotting: You MUST see your Pediatrician as soon as possible. The spotting is of some concern but I am confident your doctor will help you get under better control.

Please contact your: doctor. They can advise you, examine you if necessary and do any testing that may be needed. If you are sexually active, you should do a pregnancy test and also still speak with your doctor.