Tw miscarriage

So I had a mmc at 10 weeks baby measuring 6 week on July 9th. I passed everything naturally didn’t try but didn’t prevent and then had a chemical started my period August 13th I spotted one day then darker red for about 4 days and then 8 days or brown spotting. The past week now I’ve been having brown ewcm and not just a bit enough to have to change my underwear at least twice a day. I know I’m suppose to ovulate soon. Do you think it’s just that or should I call my obgyn. I’ve never had it this long and brown. Every time I looked it up a cancer forum comes up. But I know weird things happen after miscarriage