Wellbutrin and muscle cramping

I started taking Wellbutrin in October 2004 to quit smoking. Started at 150mg and moved up to 300 mg. Within two weeks of taking the higher dose I experienced dizziness, nausea, vertigo, tremors, muscle cramping, panic attacks, heart palpitations, concentration problems, decreased appetite, hypersensitivity to motion, smells and sounds, crying spells and feelings of impending doom. I went to the emergency room on three different occasions because I felt like I was having a heart attack (tightness in chest, racing heart, nausea, trouble breathing) and was told I had nothing wrong. I also had thoughts of suicide because I felt so bad I wanted to make it stop. I went back to my doctor and requested he taper me off due to the side effects. He did and after a month I still had the symptoms. I missed a month of work and had to stay with family because I couldn't take care of myself or my 3 year old and my husband didn't know what else to do. I finally went back to the doctor and begged for relief. I also requested he run tests to check for other causes. He did blood work and 12 lead heart monitor and found I had slight tachycardia (palpitations), but said I was healthy. He diagnosed me with having General Anxiety Disorder and put me on Paxil. I've been on Paxil for 9 months and still have some symptoms albiet much milder than before. I am now sure that any SSRI's are not for me and am looking for alternative therapies. Also, I am going to see an endocrinologist and a cardiologist just to make sure I have no other problems. I would suggest not taking a drug to quit smoking-cold turkey is the best! I was perfectly normal before I started taking these drugs. This past year has been a living nightmare. I realized my experience is very intense compared to others who have taken Wellbutrin and people react differently to medications but I would have to say that had I continued taking it I would have died. I am 36 years old, have a wonderful family and a job I love. I do not believe I have an anxiety disorder! If anyone who reads this has had a similar experience, my suggestion is to SLOWLY get off it with help from your doctor and find alternative therapy, ie. biofeedback, nutrition, homeopathic, ect. Good luck to all of you!