TTC after chemical

hi there, 

I wondered if anyone had any advice. 

I had a chemical pregnancy and I started bleeding the 18th December. 

The bleeding lasted about 3 days, and passed a couple of clots, got a negative pg test on the 20th. 

Dtd on the 20th, 25th, 28th and 31st. I've been having some ovary pain both sides, and today ive had some light pink  cm and also some brown cm. 

I normally have a 31 day cycle, and only got my bfp on chemical preg 5 days after af due. 

what could this cm be, I never normally get it...is it worth taking a test? Could it be implantation and I've ovulated early? I'm so confused?