I've had this right side pain (just on the inside of my right hip) the entire time I've had IBS symptoms (just over two yeas now). I've (24 year old female) been backwards and forwards to multiple (see probably about ten!) different doctors and all have said that it's nothing 'sinister' so to speak. I've found sometimes it's caused by food I eat (eg, I can't eat egg, or soya, lecithins, or certain fruits) as it brings on this pain, and sometimes it just comes on out of nowhere. Sometimes it gets better in a few days, sometimes it takes months. I feel it more if for example I pull my leg up to my chest, sometimes if I roll over in bed etc. I was concerned that it was my ovaries, but I had the CA125 test and that came back absolutely fine. I've also been concerned that it may be related to my cervix, however a recent doctor I visited has said that that type of pain isnt usually associated with cervical problems eg cancer or the like. Basically, I've been told it's probably a bowel spasm.