Staying away from caffeine will be a huge help for you. I do drink coffee but only decaf. Always. Each person is a little different. The foods that aggravate me may be fine for you and vice versa. You need to really listen to your body during this time of figuring things out and take note if you have pain/pressure, whatever, what have you eaten that day? You will find that it will always be something you ate that was white or very acidic. I will tell you that drinking TONS of water makes my symptoms so much better. Water is detoxifying and really helps. I probably drink 10-12 glasses of water a day on average.
I have taken aloe vera juice off and on and I'm going to start taking it more daily because from what I've read it's a very good mucilage (meaning it heals mucosal linings) which is what IC'ers need. Marshmellow root tea is also very soothing and healing to the bladder.
I think the key thing to remember when you are starting the healing process is that auto immune diseases are caused by a toxic body. So start your cleansing slowly and gently because detoxing too fast will send you into so much pain. But work through the pain however you have to (I have to use ultram) and keep feeding your body healthy. You will heal. Once you've reached a certain healing point (you'll know when you get there), you will be able to do more intense detoxing. That's what I'm doing right now and it makes me feel much better.
Most of what I've read says a person can heal themselves in two years if they are very faithful to eating right and taking healing things. I've had a HUGE amount of stress this past 4 yrs which I do believe has slowed down my progress but certainly not stopped it. So, it's taking me longer but I don't think it would have if I hadn't extraordinary circumstances going on in life.
One more thing, I am taking a homeopathic pellet (5 of them) called Staphysagria. I think that stuff is a miracle worker. I require much higher doses then can be purchased on the internet but you can buy 30C strength on the internet for $5-$6. You might try taking it daily or every other day to help with your healing. I am amazed at how well it works.
Hang in there. Don't forget to pray. I constantly ask God if he'll heal me outright. But if he chooses not to, to please give me the wisdom I need to treat my body in the way it needs to be so that I will heal from this.