Scared

Had my first u/s last week at 8 weeks 5 days. Everything checked out fine, heart beat was there which eased my worries. But now, I wake up this morning and the nausea I've been having has stopped and I feel nothing but horrible headaches. I'm currently 9 weeks 5 days. I had a m/c in February and I've been afraid(from browsing the internet) that maybe I had a missed miscarriage...