possibly... if you soaked the seeds for a bit and then scraped the fuzzy skin off then maybe you wont. when i did 10 like that i didnt vomit.
i buy them at iamshaman.com good quality and great service, but make sure you order the hawiian strain of seeds, yes they are more expensive but contain far more LSA than the ghana strain for example.
yes, you will almost certainly vomit. however, if you resist purging, you will feel like crap for much of the trip. eat light food shortly after the seeds, and the retching will be surprisingly painless. (eggs are kind)