Welcome Dulce.
It is hard for anyone to go through this disease, and we also know it is hard for the people around us. Your son is experiencing something new and challenging, and it will likely be hard at times for both of you (and the rest of the family), especially early on. But this can be reduced by informing yourself and your son about the disease as best as possible. Knowing common symptoms, trigger foods and the vast amount of information stored at this site (in addition to other places) will make this much easier for both of you. Flairs can be bad, but in truth they are often short-term problems (as in the pain and other symptoms last for only a few hours at most). If they go on for longer than that (as in half a day or longer) then you know it is likely time to go to the Emergency Room. Knowing something like this can make the first few flairs your son may go through easier to handle, as you know not to panic and try to go to the hospital right away.
In truth, your son may go years and years with no ill effects of the disease present in life. It may not even affect what he can eat. This disease is different for each and every single person, so really the best information you can learn is from self-experience with your own personal situation. I think it is important that your son takes an active role in the management of his disease. While it may be hard to, it is important not to take control of managing his condition away from him (as a mother's instinct might push her to do). He should be responsible for ensuring he is taking medications, avoiding his trigger foods, get enough sleep and avoiding stress when possible. A watchful eye and some reminders are expected, but giving your son as much control as possible over his disease is likely hard for you to do, but it will be for the best. It can teach your son responsibility and make him take better care of himself. It can also give him confidence and make him feel more in control, especially if he learns about his condition. Being aware of your disease (even if you cannot control it) gives you a sense of power though, as you know what is going on. You are able to tell people about the disease you have, and do not have to be embarassed about it.
Feel free to have your son join here also. You both are welcome to post whatever you want, and to get support on anything you require. Post any questions you may have, as we are the experts. There are no stupid questions either.... I can honestly say that I was totally unaware of this disease until it affected my family directly. I am sure this is the same for a lot of people, so do not feel ashamed to ask ANYTHING!