I was scared as well when I first found out, (DO NOT LOOK ON THE WEB), but have found it not to bad, (In fact the Fibro is much worse), but it did spark the Fibro and CSD.
Its managing it I suppose, I do find the allergies the worst thing, although I am not allergic to food stuffs, (I dont think) hay fever type allergies are bad, and I have to make sure I have anithistmines at all times, but you can do things like covering your eyes when out, closing windows at dusk, small things which help.
Do watch out for being out in the sun, I do find I an much more suseptable to sunsstroke and sun burn.
I do get flares, of more or lesser degrees, usually lasting from anything between a wekk to a month at a time, with about the same amount of time between.
I had a very bad flare at the beginning of the year, went on for 4 months, but the problem was more that my sleep went totally haywire and was only sleeping a few hours anight, which made everything else worse.
Now i am back to normal(?) and coping well.