forgotten design!

always ummed and aahhed about getting a tattoo, found a design a few years ago at Reading festival and had it done in henna to try it but it didnt take and cant remember what it looked like exactly. i m sure it symbolized Honesty and believe it vaguely resembled a snake and dagger shape but was not a snake and dagger!! any suggestions or clues as to where to find it? dont know if it was tribal , celtic etc and so far search engines are no help! anyone out there who could?