What are the chances for a second set of twins???

I had di/di twins in Oct 2021. They just turned 2 and they are the most amazing thing to ever happen to me. I just found out I was pregnant a couple of days ago BUT according to the glow app, I was 8DPO when I had my first faint line. Now I am wondering what are the chances I might be expecting twins… again!!!

These are my tests from the day of my expected period in 2021

&& these ones are from today. My period is not supposed to come for at least 6 more days (I have a 31-32 cycle. Has been like that since I had my twins in 2021. So it is pretty regular)

I feel like they are “too” dark for me being so far from my missed period day… WHAT ARE THE CHANCES? 😂🤣