Not sure what to do...

For the past 10+ days I've been nauseous, breaking out, and my hair has been greasy. On Tuesday I took an easy@home test strip and got a pretty strong positive (6 weeks along). Today (Friday) I took a clear blue and it was negative. I had a miscarriage at 8 weeks at the end of August and I'm flashing back to that. My last pregnancy I had no symptoms, so I was feeling much more confident about this one. I'm just really feeling heartbroken and I'm not sure what to do. Is it another miscarriage?

Update: more negative tests. Just waiting for the bleeding to start. I'm devastated.