I completely empathise and understand. Yes I do. I get the creepiest feelings when my gut goes through its upset times. Then I get sad because I remember the good times, and just end up crying. Sometimes it's not even my thoughts that make me feel sad or cry, it's just a general feeling that goes along with the IBS "bad days".
Also, it's disheartening when you try something and it might appear to work, but then a flare up comes back just when you think you are winning. It can make me feel very fed up.