Lower central abdominal pain could be due to UTI, cystitis (bladder infection), trapped wind or intestinal gas, constipation, anxiety or kidney stones. Investigations like blood tests (CBC, ESR), urine test, x ray, ultrasound or CT/MRI scan can be required to rule out the diagnosis.
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 and please do keep me posted on how you are doing.