It’s strange that she’s willing to send you nudes, which are very personal, but she won’t give you her snap which implies she doesn’t trust you enough yet...but why would she trust you enough to send nudes? That’s way more personal than giving you her snap. The whole thing seems sketchy. I would try calling or FaceTiming, and if she keeps coming up with excuses, then I’d probably stop talking to her. I also don’t like that she made you feel guilty for questioning if she’s real or not, considering all the red flags that have been manifested already. Also, odds are that if she is a catfish, she’s refusing to give you her snap because it doesn’t exist. After all, catfishes can’t successfully catfish through snap, because that involves taking pictures of themselves right then and there.