Hi I'm sorry if this isn't the right place to post this but I was hoping for your collective wisdom. I started bleeding yesterday at day 13 of my cycle. I'm usually very, very regular. It was bright red yesterday and is dark brown today (sorry for the tmi). My partner and I are having unprotected sex but not ttc per se. Am I miscarrying? I did a pregnancy test which was negative but I don't think it'd show up at day 13 either way. Grateful for your advice.