Help?!??!? Pos test brown spotting

Lindsey • 👶🏼💗 Mommy to a sweet baby girl born Aug. 20th 2019

My period is supposed to come tomorrow. I took this pregnancy test just now it’s positive. I also got a positive test yesterday and the day before that. I had blood work done Friday my hcg was only at an 8 which is kinda low. I’m not sure what it is now. But tests are coming out clearer. Iv been cramping on and off all day. All of a sudden I’m spotting brown/pink. It appears almost every Time I wipe nervous 😭😭 Help I’m an emotional wreck at this point so scared I’m having a missed miscarriage. Had a chemical preg last cycle