Hi doctors,
I am a 16 year-old girl. I've never really had consistent periods, time-wise, but they always involved a bit of cramping the first few days, and average, normal flow.
A day ago, I started having my period, but without all the PMS symptoms--no bloating and no cramps. Moreover, the blood is dark, and the flow is extremely light--light enough that a tampon doesn't soak up anything, just gets spots of dark brown.
What could be the cause of this? Are STDs or pregnancy a possibility? (only curious..I haven't actually had sex)