Okay. I am 18 years old. I smoke marijuana and cigarettes. And drink rarely. Every time I smoke weed my heart pounds really hard. Which has helped me not smoke for the past two days, I'm still smoking cigs. Also when I was driving home from work last night my upper body became numb and was tingling. I could barely stay in my lane. When I got home I stayed in my parents room, I was scared and didn't know what to do. Having them close helped a lot. They said if I didn't feel better by morning they'd take me to the doctor. I feel fine now, just a little weak. Does anyone know what's happening to me?