Anyone taken a FRER test at 10DPO get negative! Does this mean I'm out?

I have taken several internet cheapies with several showing two lines instantly. Vvvvf but noticeable! And just took a FRER (6 days early) and it's negative. Had a white indent line :( does that mean I'm out? Or is there a possibly I haven't implanted yet? Help! Anyone gone through this?

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