I Feel Dizzy and numb and I dont know why

[BabyBabyBabyBabyBaby]

So I belive this started when I was 8 years old. I have had trouble disconecting from screens most of my life and I still do Im 11 years old now and I have Gone to the doctor and he told me it happened every time I get anxious Its a feeling of being very disorented like your dreaming and Your limbs feel numb and sometimes it feels like im going to fall over It only happens when i get nervous or because I cant hear myself think or because of the lighting in a room! I wear sunglasses as A coping method but If i dont have sunglasses i just get too nervous. Sometimes I dont go outside and thats were my heavy Addiction to screen come from it helped me feel better but I Have beenuseing it for almost 6 hours every day! Please Help me!