i am female.my age is 20 years.i have pain on left side just below the breast and also on the back at the same level and on the left shoulder for the last one year.doctor suggested stomach pain and gave medicine regarding stomach.pain was relieved but it started again after one month.i am worried that this pain may be related to heart or pancreas or kidney or spleen.please tell me what should i do.i am so much worried about this