This afternoon about 3 PM I started feeling weak and lightheaded. I thought it might be low blood sugar so I got something to eat and drink. After about twenty minutes I felt better but during that time I called my oncologists. Since I am not currently having any treatments since May it was felt that it might not be cancer related. I just took my blood pressure twice two minutes apart and there is something happening. My first test was 91 over 57 and a pulse rate of 125 second test 84 over 63 pulse rate 115. Normal for me is 106 to 115 and 60 to 67 and 77 to 85 pulse. Dull pain in middle fo chest for last hour no other heart symptoms but oncologist said to see how I felt tomorrow. Should I follow that advice or go to the ER?