Autoimmune disease? What is Cystic Fibrosis like?

[KristaRai♥]

I am 18 years old. When I was in 8th grade I got sick one day and have been since. I am diagnosed with IBS, but things are worse. I went from being sick every few months, to throwing up every night. I weighed 105 until my boyfriend graduated, that night is when I started throwing up. I did it every night over the summer, but yet I gained 20 lbs. I started seeing blood in my stool. My pediatric GI did a few tests. I have C. Diff in my intestines. For the past month I've had a problem with mucus, no sinus problems. But there's a lot of mucus in my stool, and I cough it up a lot, it's so bad I choke and have to throw it up. It doesn't stop. I'm looking for a new adult GI in Mobile. We know it's something more. I have blood spots all over me at random times. We thought Cystic Fibrosis because of the mucus? But we are looking at Lupus, Crohn's, UC, and Cystic Fibrosis. Someone please help? Just advice or how you feel if you have any of these.