Awesome, the first time in awhile that I log on, and a question I can answer!
Like PP said, acrylic won't work a hoot on diapers; they'll leak through like crazy. Are you sensitive to Merino as well? Merino works fine, and alpaca or any other animal fiber is worth a try. Qiviut soaker, anyone?
And wool works fine for babes;you lanolize the wool so it's got that factor going for it. DS lurves his woolies!