I'm Having Black Outs I Had 2 In Like November

I'm having black outs I had 2 in like November and went to the doctor about it and they honestly didn't tell me anything we got a EKG AND A EEG done and everything came out ok expect they found a little like sinus erithmia but they said it was really normal and it wasn't anything to worry about just that my heart sometimes would get fast for a little and slow down and yea you guys know ur doctors but today I had another black out that only last for seconds each time I wasn't doing anything like standing I was sitting and this time I was sitting in my boyfriends truck at school eating lunch like we always do and we were laughing about something and all of a sudden I blacked out and came back too in seconds and I was so scared and had to regain what I was doing and I didn't really remember where I was for a second becayse it was fuzzy in my head my whole body was tingly and then it was shaky and achy and my body feels so tired MY and I was so scared I started crying I just don't know what's wrong with me and I want to stop these because there very scary to me. Can y'all give me answers ? Btw I'm 16 and a female