I’m not on my period but...

Okay I’m freaking out ever so slightly. I’ve already had my period this month, and its not due again for a couple of weeks but for the last couple of days I’ve been finding like brown/black discharge in my underwear, almost like blood clots and I don’t know what it is. I haven’t had sex so I’ve ruled that out. Like last week I got fingered but I’ve masterbated before and this hasn’t happened. Please help a girl out!!