Help I’m confused

Zozo

Guys please I need help I’m so confused. I miscarried around 3 months ago with twins . We decided to try again this month... my period was late by 4 days I had crazy symptoms. So I took a pregnancy test and it was a faint positive. The next day I got my period. The blood color wasn’t right for the full 5 days of my “ period “ it was brown. So I decided to go to my doctor and take a blood test. Well turns out I’m pregnant? How iv been bleeding for 11 days now. Well brown blood. Has this happened to anyone ?