I dont know whats going on with me?

Im a 21 year old female and im suppose to go to the dr for adhd and possible depression. lately ive been sleep eating, i wake up hallucinating my body just feels tired. im happy but i feel sad at the same time. yesterday i was just fine but i just couldnt stop laughing hysterically, my eyes watered up and immediately i was overwhelmed with being sad but i wasnt sad, i was crying for no reason, and i started laughing and crying at the same time it is possible and strange what is going on? i dont think im pregnant my sister thinks i am but i had my monthly already im 3 days to my next and for the first time i just dont feel pregnant. i dont know whats going on i get ansty and axious at work now like i need to be home! i started to sweat i never sweat! i eat wice as much as noraml and i sleep a lot more to.