My high won't go away ?

Ok so I used to smoke weed but stopped because I needed to focus on my schoolwork it was about 6months since I smoked at all.and about three days ago y sister offered me some pot brownies and I ate two. I was way too high to say the least, like scary high so I just went to bed but when I woke up I was still high. Not as intense but still felt really spacey. I wasn't worried until 3 days later I'm still feeling it. I learned my lesson, and was wondering of this will go away with time or is there something I can do