"Be you sick?" is not standard English. It could be a dialect form or an archaic usage. I understand it to mean the same as "Are you sick?".
"No better from" is not right if you mean "no better than". (It is possible that the words "no better from" could occur in a sentence, but not with that meaning.)
"We have come to expect no better from these silly, muddle-headed old fools."
"Another study carried out at the University of Geneva found that bottled water was no better from a nutritional point of view than ordinary tap water."