Hi, Welcome to Health care magic forum.
The reasons for the irregular periods
, and the dark discharge may be the anemia
and the infection.
I advise you to consult a gynecologist for diagnosis and treatment.
I usually prescribe to my patient with such symptoms fluconazole
Take more of green leafy vegetables,pulses,sprouts, and protein rich foods to have good health and resistance.
Wishing for a quick and complete recovery. Thank you.