Stress can impact your cycle, for sure; it's also important to keep in mind that even menstrual cycles that are pretty regular can have periods of irregularity sometimes, and younger people are more likely to have those irregularities. I have a distinct memory of skipping one period altogether, then having two periods only two weeks apart, all within a few months when I was 16 or so. There was nothing happening in my life that would suggest an issue like that; it was just part of how my cycle was behaving at the time.
We don't have a specific article about not ovulating, but it is true that it's possible for someone not to ovulate during the point in their cycle when they normally would. Keep in mind that if you happen to be using an app and it gives you ovulation dates just based on your menstrual cycle, it's giving you a rough guess only and you can't count on it to be accurate. You'd need to be doing things like checking your basal body temperature and cervical mucus daily, for at least six months but ideally longer, to get accurate information about ovulation; a lot of younger people don't have cycles that are regular enough to do this accurately.
If you want to learn more about this process, we have a general overview here: Fertility Awareness (FAM)
and here's some more information about the sorts of estimates a lot of menstrual apps use and why they aren't that helpful: Let's Dial Down Some (Maybe) Ovulation Freakouts
It's likely that your existing anxiety is making is much harder to deal with this scare; are you getting any sort of regular support or treatment for your anxiety, like therapy? Are there strategies you've been given to handle intense anxiety that you can try in this situation?
We do have a couple articles about anxiety that you may find helpful as well: Anxiety and Other Mental Health Resources
, Anxiety Lies
I hope you can find some ways to help yourself calm down a little. I know this is a stressful situation, but you can get through it.