spotting 4 days in a row! wtf!

Al
So I'm on day 17 of my 27/28 day cycle. I had brown spotting starting day 13 and now it's day 17 and I'm still spotting and now it's pink. I feel like it's too late to be ovulation spotting and too early to be implantation.
I usually get midcycle spotting but for like 1 day and it's never this late. I have also had cramps for a few days.
I did have a miscarriage a few weeks ago and I'm wondering if this has anything to do with it? But I had my period right after the MC as normal 2 weeks ago. 
Has this ever happened to anyone?