Are Frequent Bowel Movements And Recurring Stomach Pain Signs Of IBS?

Hi, I am 36 year old woman and suspect having IBS for more than 15 years now but never been tested. Apart from mornings, usually I poo little almost everytime I wee or perhaps around 5-6 times in a day .In the past couple of weeks, I seem to Poo bit larger quantity than usual in the morning and after lunch . For the past couple of days ,though I had non-spicy food but brown rice, vegetables and fruits ,I had on and off stabbing pains in the stomach and with wind sometimes and also when that happens its plae yellow in color . Had some party food last night and this morning heavy stabbing pain and rush to the loo in the morning with pale yellow Poo 5 times . Please advise .