As the comments and questions to your post have indicated, it sounds like a gluten problem. There are a few gluten-free beers (like Redbridge--an Anhueser-Bush product, unfortunately), so there are of course gluten-free homebrews. Most of what's available are sorghum-based.
Here is one recipe kit based on sorghum extract and Belgian candi sugar: http://www.homebrewers.com/product/ALP1051/Gluten-Free-Dark-Ale-Beer-Kit.html
You can still enjoy the pleasure of homebrewing with something like this, or I'd recommend acquiring a taste for mead (I'm not a mead-drinker myself, so my advice would be very limited here). You could do a lot with homebrewed mead without ever involving anything that could get you sick.