6 weeks pregnant with spotting over a week

Long story short- at 5 weeks 4 days, there was 2 sacs shown.. which neither had a yolk or fetal pole in. My hcg levels at the time were 4800. They ruled out ectopic. They wanted me to do another blood draw and a repeat ultrasound.

Two days later I had my levels checked again, which were 7259 ( they doubled, but not crazy double)

The next day, I had my repeat ultrasound which put me at exactly 6 weeks. That’s what the sac measurement was! The other sac didn’t grow from the last ultrasound.

Tomorrow I have yet another ultrasound.. where we hope to see everything needed to be seen. I have been spotting for over a week, and it’s never been heavy. It’s been brown mostly. The only times it was reddish pink, was when they did the vaginal ultrasound and when they “checked” me. But then it turned brown. I’m hoping I’m not going through a miscarriage. I’m trying to stay hopeful.. but idk. I’ve never experienced anything like this with my last 3 kids.

My job is physically demanding- I’m a housekeeper for a hotel . And I still breastfeed my almost two year old. Idk if any of that would play a factor in why I’m spotting.