If this pain is in the area of the appendectomy scar, could be an irritation of a nerve under the skin as a result of the incision for surgery.
If the pain you feel comes as a sudden severe cramping pain associated with vomiting and difficulty passing stool, you should talk with your surgeon about possible abdominal adhesions, that are very common after any abdominal surgery.

Feeling nauseous and vomiting aren't common symptoms of IBS, but, they can appear in an IBS sufferer.
Everyday vomiting needs medical attention.
Alternated bowel movements, abdominal pain that is alleviated with passing stool, feeling bloated, are all symptoms of IBS.
IBS symptoms can be worse after some stressful experience, like surgery is.
Nosebleeds that happen more than once in a week, and are heavy and hard to stop, should be evaluated by your physician.
Common, less serious causes for nosebleeds are allergies, sinusitis, colds, deviated nasal septum.
Vaginal discharge after appendectomy should raise suspicious for colovaginal fistula (an abnormal duct that connects two hollow organs, intestine and vagina).

Best wishes!
Marija