Dream About School And Friend

i had a dream one of my older friends (girl) were in school with me (They’re a senior in highschool and I’m a junior). And it was after dismissal and we went to our old AP World history teacher Mr la rossa’s (which I failed and got a 2 on the ap exam in real life) classroom for office hours for some reason because sahana had a question and then we were gonna leave but i left my 2 backpacks and he said “oh what happened” and i said “I left my mini backpack and lunchpale” and he laughed and said “Oh ok” and Sahana was waiting for me outside the door and then i realized like i could control the dream and i accidentally told myself “I know this is a dream” and i started to feel tickles and my heart beats faster bc that always happens when im waking up and woke up to my arm with a bunch of marks