Please tell me if i should tell my parents i think i have complex post traumatic stress disorder?

Are you a minor or : An adult? If you are a minor, it is important to let them know so that they get you professional help. If you are an adult, it your family is nurturing, then i would share it with them. Having a good support system is important to work past trauma. I would encourage you to obtain professional help. Cognitive processing therapy, emdr ; virtual reality exposure therapy can be very effective tx.