Missing period

lalala

I’ve been vegan for 10 days now & my period is 11 days late. (I’ve been on and off vegan for a couple days before that, transitioning.). I know I’m not pregnant because I’m a virgin & I knew it was about to come because of symptoms I usually get before it arrives but I never came. I’ve been researching online that I need to eat more calories so please don’t tell me that one. But is there anything else I can do. I’m 17 btw.