I have been experiencing pain intermittently for a month or two... sometimes just once a week, sometimes more frequently. The pain usually begins in my upper back between my shoulder blades and increases over a quick period of time, ending in upper and lower back pain, more like a strong ache. And then also in my gut/stomach area below my ribs... all at once. I feel nauseaus. it usually occurs in the evenings and lasts into the night. At times it carries over into the next day. I am wondering if it is an ulcer or something more serious. It has increased this past week...