Budeprion and shock

I did not even notice until a few months ago that my generic was not budeprion, not buproprion. Looked it up, found it was also the generic of wellbutrin and di not give it another thought. But I was also becoming increasingly worried, worried about my kids, that something bad was going to happento them. Worried that I would get cancer and die. Then I started to feel extra lazy, stopped exercising, and began to feel like I had something caught in my throat, the feeling moved from the throat to the abdomen and back and forth. I felt heart palpitations occasionally. today, when I flet the feeliong in my throat, I got nervous, and all of a sudden flet like I could not breathe, then flet like I was going to pass out. My sister was there, felt my pulse and it was racing and pounding. My toes felt cold and sweaty and my face felt numb. That feeling in my throat made me feel like I could not breathe, I actually had to tell myself to breathe. My sister is an EMT and she thought I was in shock. It slowly passed. I took a xanax to try and help, and I eventually felt better, though I still fell my heart palpitating. I am going to my doctor Monday to be sure I am physically OK, and discuss this drug. Has anyone else ever had this type of experience?