If you saw a worm in the poo with your naked eye, then she probably had a heavy worm load. I'd take care of the worms, even if they aren't the primary reason she died, just because they can be a contributing factor and stress the birds bodies making them more susceptible to other illnesses. If...
I use Valbazen, but had to order it online. It's a lot easier to find Safeguard goat wormer at Tractor Supply (in the US), so that's what I'd recommend. Search this site and there is a great article on dosing, and egg withdrawal. But the short answer is that you do have to toss the eggs for the...