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I am sorry to hear you are worried about cicadas.
Cicadas are not toxic insects, but the hard outer shell can irritate the lining of the colon and cause bleeding, mucus, and diarrhea. If she is eating, and not vomiting, she should be fine. You can try a little Pepto Bismal (1/4th teaspoon) if the diarrhea persists.
Let me know if this helps and what else I can help with.
How is Bella doing? I hope you were able to see what I wrote. Please let me know if this was helpful, and if you have any more questions for me.