Hella confused

I had a cp/mc on 4/5. Hubby and I resumed our regularly scheduled program once I was no longer bleeding (a week later) because I was told it’s safe. Anyone resumed getting a period 4w after a mc? If not when did you start getting a period again? Also how in the world do you count your dpo? I took a test a couple of days ago, it was negative. My lowerback has been aching for the last two days and the last few days I’ve felt like I’m always starving(not my usual pms signs). One app says I’m 4 days late, glow says I’m 6 days late.

UPDATE: I decided to just take a test cause what could it hurt?

Is it faint?