Hi wellcome to H.C.M.Forum. why you are so apprehensive about periodr. simple urine test at home will clear the doubt. it appears that you are suffering with fever
, which have head ache, naucia.
you have diarea in some fevers it also accompanies.
if it is time for perid infectin prevents bleeding, some times can have spoting.
i suggest you to see a doctor for confermation of the fever.
i wish every thing will be fine.