Stomach pains before bowel movement?

I have period like pains before i need to go to the toilet for bowel movement?. I mentioned it to the doctor a few months ago as it only really happens on a morning. Doctor said it was normal to feel pains before you need to pass bowel movement but it's been happening for months. Once i go to the toilet the pain goes?. I have no blood or mucus and i haven't lost any weight? It always happens first thing on a morning?