What to do if i do not know if it's bulimia or anorexia because i would throw up after my meals and i starve myself a lot. can i have both maybe?

Yes, not unusual...: It is not unusual for someone to have an eating disorder with binge-eating, self-induced vomiting, and food-restriction. Your problem is not that you don't know what to call this, but that you are doing these things and jeopardizing your health and your life. See a therapist who specializes in eating disorders and get help for yourself before it's too late.