I've had a similar experience (I have IBS). This is what helped me somewhat: I stopped taking all medication (which you should not do if you have a serious disease like Crohn's). I started increasing my fiber by eating (i) a high fiber cereal, more raw vegetables. Lastly, I am eating one cup of yogurt with probiotics every day, and I am taking a probiotic supplement 2x a day. This has greatly improved by bathroom experiences, reduced the smell and diarrea, and reduced my uncontrollable gas. After 3 weeks of following the above mentioned, I feel much better. Hope, it helps you, too.