Thanks for your question on Healthcare Magic. I can understand your concern. Since you have already checked in emergency room regarding pacemaker and everything was fine, no need to worry for heart related diseases for your symptoms. You are having Menopausal age. During this age, many women show hormonal imbalance and symptoms like chest tightness, sweating, unexplained arm and leg cramps etc. So better to consult gynecologist and get done hormone levels. You may need hormone replacement therapy (HRT) to regulate hormones. Don t worry, you will be alright with all these. Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.