Chemical.

I’m concerned I’m having a chemical pregnancy. I tested positive 3 days before my period. 2 days before my period I started spotting red and brown. This is on going still, I have had a miscarriage before but it is nothing like this or like my period. My tests are still positive, I don’t sleep for very long periods so the longest between my last pee and testing is two hours.. but my lines aren’t getting darker. 🤷🏼‍♀️ has anybody experienced this before. Should I go to the doctor? Currently 2 days “after” missed period.