It is very difficult to tell from this , it can be anything from prolapse Or fecal incontinence so kindly visit doctor nearby ur area

Your symptoms suggestive of “Rectal Prolapse”. Need to be examined and seen clinically. Let me know your weight and height.

Based on your symptoms, one possibility is a condition called rectocele, in which the rectum bulges towards the vaginal wall. This can cause a feeling of swelling or hardness in the vaginal region, particularly when the rectum is filled with stool, and the swelling may disappear after defecation. The stool staining you experience despite maintaining good hygiene may be due to incomplete evacuation of stool or mild fecal seepage. However, other conditions such as anal fissure, hemorrhoids and pelvic floor dysfunction can also produce similar symptoms. Since your symptoms have persisted for two months, I would advise an in-person consultation with a general surgeon or colorectal surgeon, along with a gynecological examination if required. A perianal examination, digital rectal examination and pelvic examination may help identify the cause. Meanwhile, avoid straining during defecation, maintain adequate hydration and ensure your stools remain soft. If you develop severe pain, fever, significant bleeding or difficulty passing stool, seek urgent medical attention.

That bulge in your vaginal area during bowel movements is often related to changes in the pelvic floor muscles supporting your rectum and vagina. Along with the rectal pain and stool marks you're noticing, this pattern needs an in-person pelvic floor check to know exactly what's going on.