I'm so sorry your son's illness has brought you here.
But, I'm glad you've found this forum, there are many parents and members who can offer you support, advice and knowledge!
It's heartbreaking to see your child sick
, my son is also 18 and was diagnosed at 16. It's breaking my heart but, today, he will be having his first remicade infusion. As hard as it is, without the support and advice I've received here, I would be lost! A very interesting thread was recently started about parents dealing with their child's IBD; I think you may find it comforting to know we all understand your worries and grief. Here is a link:
http://www.crohnsforum.com/showthread.php?t=47285
What is your son's current treatment? How is he feeling? From your post, I am assuming that his current treatment isn't working very well for him. If you can provide more details, I have no doubt that someone here has knowledge and experience to share with you, as well as other ideas to explore.
I'm sure you know it can take time to find the right treatment for each person and it can take time. But, meantime, there's nothing more heartbreaking that seeing your child suffer and not be able to fix it. But, his situation can/will improve!! Here's are two links to the success stories posted here:
http://www.crohnsforum.com/showthread.php?t=27079
http://www.crohnsforum.com/forumdisplay.php?f=72
Please also look through the treatment section of the forum; you'll find subforums for all types of treatments and lots of information.
I'm sure you'll be hearing from lots of other parents! You will find incredible support here, feel free to ask questions!
:ghug:
EDIT - Oops, lots of other posts already came through while I was typing