Positive, negative, positive, negative

Let me preface this by saying I have contacted my OB and am waiting to hear back.

So I have been getting alternating results since saturday. I am using the same kind of test, FMU. All precautions in place.

Saturday (FMU)- positive

Sunday (FMU)- negative

Monday (FMU)- positive

Tuesday (FMU)- negative

Wednesday Today (FMU)- positive

I am 8 weeks post 10w miscarriage but did have a period 4 weeks ago. So hormones should have returned to normal.

Thoughts???? I am so confused.