I'm not entirely sure that a suboxone withdrawal will occur after 11 days of use, because the levels will teeter down slowly and in effect provide you with an unintentional detox. Physicians warn that use beyond 7-10 days will result in addiction/withdrawals, so 11 days is kind of not too far out of that period. In fact, you've now become our guinea pig as such. Please come back and let us know when/if you start withdrawing.
According to what I've read over the years the withdrawals for suboxone are slower to occur and take longer to cease, but 2-3 days is a pretty good benchmark for expected onset. Some suboxone clients are able to dose every second day and successfully maintain that. Out of curiosity, did you take suboxone to get clean or just to hold you over for a bit? The answer to this question is of significance and will definitely affect how I respond further.