Leftover HCG even after a period???

Su

Hello

I had a MMC at 12 weeks on 25th May .

I had a period on 27th June .

We are TTC again and for the last few days have felt nauseous, dizzy & generally off. Took a FRER today & got this vvvfl .

Is it possible that this is still leftover HCG 7 weeks after D&C or this this my rainbow 🌈? i am 9dpo

Thank you x