Need some insight …

I am 7 weeks and 3 days pregnant. I have been spotting now for 6 consecutive days. It’s mostly only when I wipe that I see it. It’s a range between light brown and light pink. I have mild cramps but nothing too bad and I’m extremely tired all the time. I called my doctor when I was 3 days spotting but they weren’t too concerned they said as long as I’m not cramping bad and filling a pad or have bright red blood it’s nothing to worry about. Plus I had an ultrasound when I was 6 weeks and 1 day and everything was okay. I have another ultrasound when I hit 8 weeks. But I’m really concerned about spotting for this long.. I miscarried with my first pregnancy in 2016. And my second pregnancy in 2018 was full term. Has anyone spotted this long and had a healthy pregnancy/Birth?