Thanks for your question on Healthcare Magic. I can understand your concern. In my opinion, your fast heart rate is mostly due to stress and anxiety. You must have attempted suicide by taking overdose of muscle relaxant drugs. This means you are going through a lot of stress, anxiety and depression. All these can cause fast heart beats. So better to consult psychiatrist and get done counselling sessions. Try to identify stressor in your life and start working on it s solution. You may need anxiolytic and antidepressants drugs. Don t worry, you will be alright. Avoid stress and tension, be relax and calm. Better not to take do such things in future. Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.