Subchronic implantation??

Ha
Ok it has been 2 weeks since my ultrasound and now I have gotten off heartbeat high and back to worrying. The ultrasound tech said I had Subchronic implantation bleeding and showed it to me. I see a girl had a miscarriage in the other group. Anyone else get this? I had brown spotting for an hour or so at 5 weeks but nothing else. Also my doctor didn't address this. Just the ultrasound tech and I don't get another ultrasound until 16 weeks!!!