Hi there,
I used to get acid reflux and puke every time I ate more than half a raw carrot. I think it takes time for your system to get used to it. At least it did for me. I think my gastro was so screwed up from standard American diet (still is to a great extent), I couldn't really break down the food the way I needed to in order to digest.
If it's the same for you, you'll be able to tell if you can say, drink broccoli (or in my case carrot) juice and that doesn't make you feel nauseau or cause you to vomit.
Anyhow, I solved it for myself with a mandoline -- if you don't know what that is, it's one of those v-slicer type things -- actually, mine is a v-slicer, the borner v-slicer (twenty bucks on Amazon is the cheapest I found it -- for some reason, a thirty dollar amazon source comes up first though so look for the twenty buck one, I think the supplier was called kitchen-something).
I really couldn't possibly be raw without one of these, it saves so much time, but if you get one, make sure you always always use the handle, everybody tells you that but it seems like everybody, including me, has to slice their hand up really badly at least once before taking that advice.
Raw yams, by the way, are absolutely delicious shredded -- I use raw yams, raw red or vidalia onion and raw apple to make the most delicious cole slaw (of course it's good to add cabbage to it or shredded carrots, too).
best of luck, the raw thing really takes patience. Although I've been mostly raw for a while, I'm now less than a week into 100 percent and I feel really crappy, whereas mostly raw, which is what I was used to, felt great. So you should probably expect to feel off as you detox. The same thing happens when you're doing a juice fast as when you're doing raw.
The worst part is, every time you really backslide badly, the detox thing happens again. Sadly, this isn't my first try at all raw, I've gone as long as a month before, but when I fall off the wagon, well, it starts out small but then accelerates -- this most recent time, I ate a whole whole lot of hot dogs both meat and soy.
Best of luck, even with the detox die-off, the net-gain in how good you feel is worth it.