I’m sure she’ll be fine but you can always take her to a reptile vet (there must be one or two in Arizona, given all the tortoises owners I think live there).I
I'm so upset right now, My husband bought cactus pads from ebay. He doesn't know from who, where etc.. She's been in an outside enclosure for a few months now, doing great and thriving. He fed her some when I wasn't there, now I'm afreaid she may have issues! Seriously, I looked at the site,very creepy. I hope she doesn't pass away from these from wherever cactus pads!
When I look at the nopales listings in ebay many of them are sold for the purpose of growing and eating their fruit; if they are safe for humans they are safe for your tortoise. Can you read allllll the way to the bottom of the listing? Sometimes it’s in the very small print. Not all are sold for fruit, some are for landscaping, but perhaps you can find something to give you peace of mind.