What could be the reason for lower back and rectal pain episodes, which typically need to use in restrooms?

Hello doctor,

My wife has been having lower back and rectal pain episodes for the past month, generally in the late evening. She typically needs to use restrooms within 30 minutes of eating to evacuate. Shortly after, she will experience intense pain and burning in her rectum and anus area, which will cause her to start crying. We lack health insurance. She has been receiving treatment for her health difficulties at the local health department. Proctalgia fugax was identified by a health department doctor solely based on a conversation with the patient about her current symptoms and with no physical examination. Reading up on this revealed that although she has been experiencing practically daily pain, it is a periodic pain that typically occurs three to five times a year. To treat the symptoms, the doctor gave her a Ventolin inhaler, which appears to help lessen the length but does little to ease her intense pain. It would be an understatement to say that I am worried about my wife's condition. Given our current insurance status, I am unsure of my options. Do you think she needs a CT scan? Kindly help.