Having adominal pain on the left side up toward the ribs and down to the stomach and in the left part of back look pregnant and nauseous.

Various causes: The symptoms are nonspecific but can occur with gas entrapment in the upper descending colon. Other possibilities include gastritis, constipation, kidney stone, pancreatic disorder. It's best to be checked now by a physician who will take a history, examine you and order appropriate tests in order to make diagnosis.

Left flank/abd pain: How long do you have the pain, how often? do you have any other medical problem? any medications?, any diarrhea or constipation. detailed history would help us to answer the question. It could be gastritis/esophagitis, muscular they are common causes, but many more little rare reasons be possible, have it checked out.