Possible Crohns disease? help

So I went to the local ER last week complaining of severe stomach cramps in my lower right hand side. A little helpful background info: I have been to the ER numerous times over the last couple of years complaining of stomach pain. My mother always says Im just a baby and that I over react with any little pain, which I can openly admit I tend to do, however these stomach pains are very real and very painful when they come about. Almost everytime I have been to the ER they tell me that the source of my pain is cysts or burst cysts on my ovaries. But I always knew it was more... In the early fall of 2006, during one of my visits to the ER, I was told that a catscan showed a thickening of my intestinal wall, namely the ileum. I was told to follow up with a gastroenterologist, and I did. They did a colonoscopy and my ending diagnosis was a simple case of Iritable Bowel Syndrome. Well, ever since then everytime I get pain, I ignore it, thinking it will pass. But Last week, I was really in a substantial amount of pain that drove me to go to the hospital. When i was there they did a catscan and an ultrasound that came back AGAIN with a thickening of the ileum and that more than likely I have crohns disease. So they told me to follow up with my primary care doctor and to see a gastroenterologist AGAIN. So when I saw my PCP 2 days ago and he said that since Ive had a thickened intestinal wall twice in the past two years, and given my chronic stomach pain, that I probably do have crohns disease... What I want to know is, if this happened 2 years ago, and all the testing came back fine, why would it suddenly be crohns disease? Did I have it then and they just missed it? Or was it too early on to catch? But what is different this time around then last time around? If a colonoscopy 2 years ago showed that everything was fine, then why do i have a thickened intestinal wall AGAIN, and why is suddenly everything not fine? Is it possible that there is some other reason for my intestines getting thickened chronically? I dont know, I am hopelessly confused and I need some answers, but I made an appointment with a gastroenterologist and unfortunately I cannot be seen for another 2 months! What do I do in the mean time to get rid of the pain? What should I be watching out for? Can somebody please give me some advice, because honestly at this point I feel very alone.