@ThePizza
I am in NO WAY a professional on this subject, or a professional at all.
But I can link you to some websites that ARE experts on this subject, and I hope it helps.
https://www.nationaleatingdisorders.org/learn/by-eating-disorder/anorexia
https://www.mayoclinic.org/diseases-conditions/anorexia-nervosa/symptoms-causes/syc-20353591
https://www.eatingdisorderhope.com/information/anorexia
@ThePizza If you have started restricting (the therm for eating less and saying that you gotta eat "this much" to function) there is a risk of you developing an eating disorder. If you find yourself restricting, and then binging (eating a big lot) and then wanting to purge, you got yourself a problem.
But the only way to be sure of if you are developing an eating disorder or not is going to a therapist.