Spotting heavily and still positive hpt

Divya

On 11dpo I checked and it was faint positive 12dpo hpt was white again no lines, than I thought I am out this month and on 5th period started and it was not spot but a good flow but again on 7th October 16dpo I did check and it was positive hpt,

How this can be possible???

I am really confused, shall I go or blood test or wait few days