<s>[INST] Hi, Ive had pretty sever stomach pain for the past few days. It started just in waves but is pretty constant now. It is in the upper abdomen but my back is starting to ache also. It feels very painful but akin to hunger pangs, but when I eat it doesn t help. I am also on my period at the moment which usually brings cramps but noting ever like this. Do I just wait this out? [/INST] Hello and Welcome to ‘Ask A Doctor’ service.I have reviewed your query and here is my advice.There are various possible issues as pancreatitis, biliary colic, acute gastritis or other issues, needs to be evaluated with ultrasound of the abdomen and pelvis. I strongly recommend consulting the ER for immediate pain relief and further management. Hope I have answered your query. Let me know if I can assist you further.Regards,      Dr. Bhagyesh V. Patel </s>