i have been regular as clockwork since i can remember, but: last month i had a freaky period, spotted on the sun (when af was due) then period started on the tues properly. bled bright red, no tissue/clots/tail off and stopped dead after 5d. docs thought it might have been a false period and to be safe did a blood HCG test which came back as def not pg (-1 HCG) well, period not due for a week and its started already, only light but definately blood. this is vv odd. never had this before and im a bit worried. we havent been ttc, reassure me please!