I have never vomited, I have never PB (in the 3mo of having my band) and now today I have been sick. Can a person go from one day being fine and the next day slipped?

you probably have not slipped--that takes a bit!! the band is fickle to say the least--maybe it did not like what you fed it--or you did not chew well enough or you ate too much or you drank too soon after eating....in any event don't be so quick to think its a slip!! there also might be a bug going around--not fun...but it passes!! I am 16 months out and have had it all..including a schedule for gall bladder surgery on oct 24th...thought it was just the band acting up till I threw up bile for 4 days....every day seems to bring both a new joy and/or malady:) best of luck...by the way I am 120 lost as of last friday...only 43lbs from goal!! it does happen!!