Super early pregnancy test?

This is my 5th pregnancy- 4th baby and I’ve always gotten a positive test early. My first 4 pregnancies I got a positive around 9-10 DPO. I’ve always relied on FRER and they’ve given me good results.

This time, I got a positive at what my app estimates to be 7 DPO ?!

I was ovulation testing as well and sure enough, I got my first faint positive a week after ovulation.

That was 3 days ago now. I’m still 4 days before my period is due and the tests are getting darker and darker.

I’m also having a lot of pregnancy symptoms and definitely sensed I was pregnant before the tests- being my 5th time around I knew pretty well what to be looking out for.

Anyone else experienced this? I started to wonder if it’s twins or why my HCG would be so high.