My head is messed up?

Okay, so - don't critize my inanity, please - but I must admit I tried knocking myself out. So I got in my room, bent my knees and breathed real hard, and when I stood up after a like 15 seconds of hard breathing, I blew on my finger. So at first it was kinda like normal light-headedness-and then turned into full on feeling like I was high, lol. Ok, so I took a shower, then I came out and went on my computer. Then I have these spinning lights (almost like I was seeing ceiling fans in the corner of my eyes) and they multiplied around the rim of my eye and disappeared. WTF? And yes, I know I'm a stupid teenager. Live and learn. P.s. came back slowly high up in the middle of my vision.