In shock - identical twins

Mkmt
We've been TTC naturally for five years and TTC with <a href="https://glowing.com/glow-fertility-program">IVF</a> for the last two. I did two fresh cycles and four frozens. I've had one m/c at 5.5 weeks and a chemical pregnancy. 
This last FET, we transferred two five day blasts. We went for first u/s at 5 weeks 6 days and were shocked to see we've got IDENTICAL twins in there-- they share a placenta but thankfully have their own amniotic sacs. 
I just can't believe it. The chances of identical are like 1-3% and your chances aren't increased with <a href="https://glowing.com/glow-fertility-program">IVF</a>... Or are they? 
Now we're just holding our breaths for the next 35 weeks... If we even make it that far.