Spotting at 5 wks

I found out last week that I am pregnant again. I had a missed miscarriage at 11wks in November. I was so excited because I got a BFP on my original due date from my first pregnancy 🌈 But Sunday I started with brown spotting 🙁 which I'm freaking out because that's the same thing that happened with my first pregnancy! Anyone have the same with a positive outcome? I'm getting serial Hcg blood tests and yesterday's came back at 2500. More tomorrow and ultrasound Friday....