feeling faint and sick

something serious happened to me the other day and i was wondering if this has happened to someone else and they have some advice for me?? by the way, i'm going to a doctor soon to get this checked out, but i'm just wondering if any of you have some stuff for me to feel less sick.

so, this past sunday, i was feeling really nauseous. it was probably because i hadn't eaten anything all day, but when i got up, my eyes started to blur and my ears made everything i heard sound muffled. when i was finally able to stay on my feet and make myself something to eat, i made some sandwiches. i went to go put the ham back into the fridge, and it was like my eyes were open but all i could see was black.

when i could see again, i had hit my head on my kitchen counter near the fridge and fell into the floor. i struggled to get up and get back to my food, but when i did and i rounded the corner into the hallway, i hit this shelf of glass kitchen bowls and pitchers we have. i take a step into the hallway, and i fall again.

i had to get my little brother to carry my food to my room. i didn't think i could sit up in a chair at the table for too long. i almost had to start limping against the wall because i could barely stand. my mom got really worried and asked what was wrong. i cried to her about what just happened and then i went back to my room. i struggled to eat my sandwiches from how nauseous i was, but i managed.

later that night i went to the doctor because my ears were hurting. apparently there's nothing wrong with them, but the nurses did say something about how i may have problems with my blood sugar levels. 

i just came on here to see if someone else had something similar and now has a diagnosis for something so please give me some advice on what to do when i start feeling faint !!