What could be causing my daily episodes of dizziness, disorientation, and twitching as a 15-year-old female? - #29501

I've been having these symptoms and I'm not sure who to go to and what to look into. I'm female 15. -Daily episodes of dizziness and disorientation: •Episodes tend to occur during my classes and when in working, but they sometimes do happen at other times • Happens almost exclusively while sitting or lying down •Have tested negative for epilepsy •Normal blood pressure and iron •During them I feel I am twitching/shaking •When sitting, I feel like I'm falling forward. I tend to grip what's there to prevent this. Almost fell out of a bus seat once. •I forget where I am/what I'm doing during these, and my thoughts begin to wander to random stuff I can't remember afterwards •10-30 seconds • Haven't appeared to correlate with stress, water intake, diet, weight gain/loss, or remembering my medicine (Adderall, vitamin d, and lexapro) •Increased heart rate when finished, can usually feel it without checking my pulse •Nobody seems to notice these from the outside •Can happen as little as once daily or about 5-6 times daily •Suprinsigly haven’t had one while driving, which seems to imply that something about driving may be preventing them? •I sometimes see myself from a third person while this happens. Adding onto this I will occasionally envision a person (whom I can't remember afterwards) standing next to me, and my mind will tell me to reach out to them for support. This is extra freaky for me because up until now I've been pretty much aphantasiac since the age of 12. Aside from these episodes I can't really envision things or hear thoughts. •I have visual snow and sound sensitivity, which are briefly heightened after •I can feel my heartbeat in my forehead •I feel a bit tired after. Not in the “I need a nap” way but in the “I want to go home, lie down, and do something pointless” way. •I lose awareness outside of my immediate surroundings. I don't process them well, but I still know stuff like “grab the desk and not the computer to stabilize yourself”. •Nobody has tried to talk to me during these but I don't think they could. When people were saying stuff during them, I didn't process/hear it. •The twitching is small little stuff •The only difference in vision I have is that they can have a hard time focusing during these episodes •My service dog who alerts to anxiety and migraines doesn't alert to anything •There is slight confusion about what happens during an episode right after I get out of it. Memories of them are usually hazy. •I can feel a bit detached afterward