Newbie BP breeder, but had been breeding leopard geckos in the past...
If there were big veins then just give them some more time.
When they start to deflate and "sweat" you're getting close!
My first BP clutch was out of the eggs on day 61.
they should start to pip any time now. If one pips, you could cut the others just in case and see what's up. If they don't pip by day 60 or if the eggs start to change colors or smell wrong, I would cut and check on the little guys.