Black spotting??

So I got off my af about a week ago , was normal lasted 3-4 days and I ovulated literally has my period was ending on day 4 . I'm out of ovulation test so I'm going by Glow right now and according to it I should be ovulating ... Scary thing I woke up to brown spotting not much discharge and it's been on and off all day I'm not cramping my pelvic feels sore like but other than that nothing ... I just went to check my new pad I put on cause I felt something and it's black y'all seriously coal black ! Is this normal has anyone else had this.ive never had this , I've had old blood before but never anything this dark . Thanks in advance !