Spotting and so frustrated

I found out I was pregnant March 1. A couple days later, I started spotting, it started out pink, then brown, and now red. My OB did blood work. My Hcg level was 102. One week later it was 458. I'm still spotting. I'm frustrated to be spotting like this, and he hasn't done anything but blood work. It's scary and I just want answers.