These look like two separate entities. Proteinuria requires further evaluation. Large amounts of protein in urine may indicate a serious kidney problem. You need a CT scan and kidney function tests to check the status of kidneys.
The abdominal symptoms can be due to irritable bowel syndrome. Common symptoms include abdominal cramping or pain, bloating and gassiness, and altered bowel habits(alternate constipation and loose stools).
You should discuss both these possibilities with a physician.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care.