What Is The Cause For Stomach Pain At The Base Of The Breast Bone?

I have a tired feeling in my mid to upper back combined with strong stomach pains. The pain in my stomach is high nearly at the base of my breastbone. I have had a cough and cold also, not sure if this is related. Pain in stomach and back has been around two weeks since onset but comes and goes. I am a 33 year old female with no known health concerns at healthy body weight ect