SUBREDDIT: r/AskDocs
TITLE: Fainted and may have hit my head while falling
POST: Hello guys, I'm just going to jump right at it since i'm pretty concerned
Yesterday my parents left early for work so I decided to wake and bake. I smoked a small joint and ate eggs with bread in my room. The eggs turned out to be undercooked so I was going to throw them away. Now my kitchen is on the 2nd floor of my house and my room is on the 1st floor, I ran up the stairs and started to feel really dizzy, it got worse and worse in the matter of like 5 seconds or so, I had to hold on to my fridge to be able to stand up, and my vision began to blurr out, in Sweden we call it Myrornas krig but I can't really translate it so here's a copy paste explaining what it is: Random, usually monochromatic, video noise (typically caused by a white noise input signal to a television, often due to lack of reception), in which it appears that white ants are fighting the black ants in an endless metaphorical battle; static, noise, snow
Anyhow, the ants war thing began blurring out my vision untill it all went black, I heard a loud bounce, almost like if you slam something hard into a wooden kitchen table, anyhow i woke up on the kitchenfloor on my back and it took me 3-4 seconds to realize I was lying on the floor. I was out for about 1-5 minutes, I also had a pain in my kneecap, in the back of my head and on my forehead, they're all on the left side of my body and now everytime I sit down for a while and i go to stand up, i get really dizzy again and every time, it scares the living hell out of me because i'm afraid i'm going to faint again. Should i maybe go to the hospital and get my head checked out?

I'm 20 years old male btw, i smoke a ton of cigarettes and pot, I also have been eating badly the last couple of days, maybe 1 meal a day.
TL;DR: 
Fainted, hit my head and woke up 5 minutes later and now i get dizzy everytime i stand up after sitting down for a while