Middle upper abdomen pain in waves

[millynessultra]

For the past several days there has been a squeezing mild pain in the upper middle part of my abdomen. I recently developed a chest infection (coughing up mucus and such) and this began when the infection did. It is very random and when the wave hits, it only lasts about 2 seconds and I feel completely normal again. I'm concerned that it is something bigger than just indigestion due to the length of time it has been occurring. Could this be anything else that I'm not realizing?