Period after a chemical pregnancy

Danielle

I wanted to see if anyone knows if a chemical can cause your period to be delayed? I had a miscarriage at 8 weeks on thanksgiving, an on time cycle in December, and now this month my cycle is 6 days late with negative tests. I had taken a test around 12dpo frer that was what I was sure was a light positive but every one after that was negative. I wasn't sure if maybe I ovulated late or what could be going on. thanks!