Hello PC, thank you for your reply. It is so good to hear from people with similar complaints as I have, and it is also very good to know that I am not alone.
About your food-question: I have always had problems with my intestines. Sometime they act normal, and sometimes they "mess up". And in most cases it is hard to tell if it is a result of something I ate. So also for my MP it is hard to tell if there is certain food that causes problems.
But I have found out some things that seem to work for me, but not in the way that they cure things: don't eat to many in one time (little portions is better) and food with a lot of fat doesn't improve the situation. I'm also trying to lesser my use of sugar.
But I don't quit eating all the things I like, because dealing with MP is hard enough, so there is no need to make your life more uneasy.
But I try to eat less of the "bad" things and more of the healthy things. Although I've always done that in my life.