Wondering what is wrong with me

I may have to go to the doctor.  For the past week, I have been having headaches and blood sugar lows.  I am very concerned about my health.  I wish that I knew what is wrong.  I wonder if something is worse than I thought it would be.  I am not a doctor so I don't wish to diagnose myself but I just hope it is not the diabetes. Right now my blood sugar is normal so I wonder if it could be something else.  Maybe I am just worried over nothing.  I tend to worry over things that haven't happened yet or never will happen.