Do I have Diabetes

Patient: HelloMy name’s Jasmin , i’m 16 years old , and i have a lot of symptoms that are referring to Diabetes , and i wanna know if i do have it .Here are my symptoms :-I really hope you can help me with this and tell me whats wrongThank yousincerely Jasmin

Symptoms: 1-Light headiness / Dizziness
2-Blurry vision
3-Unbalanced weight gaining and weight losing
4-Always feeling hungry and thirsty
5-Always feeling dehydrated
6-Black vision (whenever i do a sudden movement like standing up)