Hello and welcome to HCM, Pain in lower abdomen while standing and laughing can occur in large number of conditions like musculoskeletal pain, disease state of pelvic organs or abdominal organs. Pregnancy will not cause lower abdominal pain which increases on standing or laughing. In case you want to confirm or rule out pregnancy, you need to get an urine pregnancy done. An ultrasound lower abdomen and pelvis is recommended to look for the cause of lower abdominal pain. Association of lower abdominal pain with laughing and standing is suggestive of musculoskeletal disorder. Thus, consult your primary healthcare provider for clinical assessment, relevant investigations and thus management. Thanks and take care Dr Shailja Puri