I smoke weed regularly, but when i did my first shotty(homemade bong) it was like my eye sight went and everything was going mental around me e.g. Waving your hand it would jitter, and my body went like numb. My heart rate did speed up. Anyway today I bought some bud of this man I have never bought it from before. Me and my mates were smoking it fine and we finished it, after 5-10 mins it happened to me, I couldn't focus on anything and my eye sight started to go weird again, this is 6 months after the bong incident! Please someone tell me what is happening?!