BFN on 12 dpo

Sharn

Its my first cycle after miscarriage in august. Got positive opk on 30 october and bd on 29 october. Today i’m 12 dpo. No symptoms but nausea on/off. Any suggestion?? Any similar stories got bfn on 12 dpo but got bfp later??? Please.

Update i got spotting now.

Is it implation spotting or period?? Period due in 2 days.